nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19 #include "parser.h"
  20
  21 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  22
  23 static ir_type *ir_type_const_char;
  24 static ir_type *ir_type_wchar_t;
  25 static ir_type *ir_type_void;
  26 static ir_type *ir_type_int;
  27
  28 static type_t *type_const_char;
  29 static type_t *type_void;
  30 static type_t *type_int;
  31
  32 static int       next_value_number_function;
  33 static ir_node  *continue_label;
  34 static ir_node  *break_label;
  35 static ir_node  *current_switch_cond;
  36 static bool      saw_default_label;
  37 static ir_node **imature_blocks;
  38
  39 static const declaration_t *current_function_decl;
  40 static ir_node             *current_function_name;
  41
  42 static struct obstack asm_obst;
  43
  44 typedef enum declaration_type_t {
  45         DECLARATION_TYPE_UNKNOWN,
  46         DECLARATION_TYPE_FUNCTION,
  47         DECLARATION_TYPE_GLOBAL_VARIABLE,
  48         DECLARATION_TYPE_LOCAL_VARIABLE,
  49         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  50         DECLARATION_TYPE_COMPOUND_MEMBER,
  51         DECLARATION_TYPE_LABEL_BLOCK,
  52         DECLARATION_TYPE_ENUM_ENTRY
  53 } declaration_type_t;
  54
  55 static ir_type *get_ir_type(type_t *type);
  56
  57 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  58 {
  59         (void) pos;
  60 #if 0
  61         const declaration_t *declaration = & value_numbers[pos]->declaration;
  62
  63         print_warning_prefix(declaration->source_position);
  64         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  65                         declaration->symbol->string);
  66 #endif
  67         fprintf(stderr, "Some variable might be used uninitialized\n");
  68         return new_r_Unknown(irg, mode);
  69 }
  70
  71 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  72 {
  73         const source_position_t *pos = (const source_position_t*) dbg;
  74         if(pos == NULL)
  75                 return 0;
  76         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  77                                    pos->linenr);
  78 }
  79
  80 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  81 {
  82         const source_position_t *pos = (const source_position_t*) dbg;
  83         if(pos == NULL)
  84                 return NULL;
  85         if(line != NULL)
  86                 *line = pos->linenr;
  87         return pos->input_name;
  88 }
  89
  90 void init_ast2firm(void)
  91 {
  92         obstack_init(&asm_obst);
  93 }
  94
  95 void exit_ast2firm(void)
  96 {
  97         obstack_free(&asm_obst, NULL);
  98 }
  99
 100 static unsigned unique_id = 0;
 101
 102 static ident *unique_ident(const char *tag)
 103 {
 104         char buf[256];
 105
 106         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 107         unique_id++;
 108         return new_id_from_str(buf);
 109 }
 110
 111 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 112 {
 113         switch(atomic_type->atype) {
 114         case ATOMIC_TYPE_SCHAR:
 115         case ATOMIC_TYPE_CHAR:
 116                 return mode_Bs;
 117         case ATOMIC_TYPE_UCHAR:
 118                 return mode_Bu;
 119         case ATOMIC_TYPE_SHORT:
 120                 return mode_Hs;
 121         case ATOMIC_TYPE_USHORT:
 122                 return mode_Hu;
 123         case ATOMIC_TYPE_BOOL:
 124         case ATOMIC_TYPE_LONG:
 125         case ATOMIC_TYPE_INT:
 126                 return mode_Is;
 127         case ATOMIC_TYPE_ULONG:
 128         case ATOMIC_TYPE_UINT:
 129                 return mode_Iu;
 130         case ATOMIC_TYPE_LONGLONG:
 131                 return mode_Ls;
 132         case ATOMIC_TYPE_ULONGLONG:
 133                 return mode_Lu;
 134         case ATOMIC_TYPE_FLOAT:
 135                 return mode_F;
 136         case ATOMIC_TYPE_DOUBLE:
 137                 return mode_D;
 138         case ATOMIC_TYPE_LONG_DOUBLE:
 139                 return mode_E;
 140 #ifdef PROVIDE_COMPLEX
 141         case ATOMIC_TYPE_FLOAT_COMPLEX:
 142         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 143         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 144                 panic("complex lowering not implemented yet");
 145                 break;
 146         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 147         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 148         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 149                 panic("imaginary lowering not implemented yet");
 150                 break;
 151 #endif
 152         case ATOMIC_TYPE_VOID:
 153                 /* firm has no real void... */
 154                 return mode_Is;
 155         case ATOMIC_TYPE_INVALID:
 156                 break;
 157         }
 158         panic("Encountered unknown atomic type");
 159 }
 160
 161
 162 static unsigned get_type_size(type_t *type);
 163
 164 static unsigned get_atomic_type_size(const atomic_type_t *type)
 165 {
 166         switch(type->atype) {
 167         case ATOMIC_TYPE_CHAR:
 168         case ATOMIC_TYPE_SCHAR:
 169         case ATOMIC_TYPE_UCHAR:
 170                 return 1;
 171
 172         case ATOMIC_TYPE_SHORT:
 173         case ATOMIC_TYPE_USHORT:
 174                 return 2;
 175
 176         case ATOMIC_TYPE_BOOL:
 177         case ATOMIC_TYPE_INT:
 178         case ATOMIC_TYPE_UINT:
 179         case ATOMIC_TYPE_LONG:
 180         case ATOMIC_TYPE_ULONG:
 181         case ATOMIC_TYPE_FLOAT:
 182                 return 4;
 183
 184         case ATOMIC_TYPE_LONGLONG:
 185         case ATOMIC_TYPE_ULONGLONG:
 186         case ATOMIC_TYPE_DOUBLE:
 187                 return 8;
 188
 189         case ATOMIC_TYPE_LONG_DOUBLE:
 190                 return 12;
 191
 192         case ATOMIC_TYPE_VOID:
 193                 return 1;
 194
 195         case ATOMIC_TYPE_INVALID:
 196                 break;
 197         }
 198         panic("Trying to determine size of invalid atomic type");
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type((type_t*) type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type((type_t*) type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_type_size(type_t *type)
 214 {
 215         type = skip_typeref(type);
 216
 217         switch(type->type) {
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size(&type->atomic);
 220         case TYPE_ENUM:
 221                 return get_mode_size_bytes(mode_Is);
 222         case TYPE_COMPOUND_UNION:
 223         case TYPE_COMPOUND_STRUCT:
 224                 return get_compound_type_size(&type->compound);
 225         case TYPE_FUNCTION:
 226                 /* just a pointer to the function */
 227                 return get_mode_size_bytes(mode_P_code);
 228         case TYPE_POINTER:
 229                 return get_mode_size_bytes(mode_P_data);
 230         case TYPE_ARRAY:
 231                 return get_array_type_size(&type->array);
 232         case TYPE_BUILTIN:
 233                 return get_type_size(type->builtin.real_type);
 234         case TYPE_TYPEDEF:
 235         case TYPE_TYPEOF:
 236         case TYPE_INVALID:
 237                 break;
 238         }
 239         panic("Trying to determine size of invalid type");
 240 }
 241
 242 static unsigned count_parameters(const function_type_t *function_type)
 243 {
 244         unsigned count = 0;
 245
 246         function_parameter_t *parameter = function_type->parameters;
 247         for ( ; parameter != NULL; parameter = parameter->next) {
 248                 ++count;
 249         }
 250
 251         return count;
 252 }
 253
 254
 255
 256
 257 static long fold_constant(const expression_t *expression);
 258
 259 static ir_type *create_atomic_type(const atomic_type_t *type)
 260 {
 261         ir_mode *mode   = get_atomic_mode(type);
 262         ident   *id     = get_mode_ident(mode);
 263         ir_type *irtype = new_type_primitive(id, mode);
 264
 265         if(type->atype == ATOMIC_TYPE_LONG_DOUBLE) {
 266                 set_type_alignment_bytes(irtype, 4);
 267         }
 268
 269         return irtype;
 270 }
 271
 272 static ir_type *create_method_type(const function_type_t *function_type)
 273 {
 274         type_t  *return_type  = function_type->return_type;
 275
 276         ident   *id           = unique_ident("functiontype");
 277         int      n_parameters = count_parameters(function_type);
 278         int      n_results    = return_type == type_void ? 0 : 1;
 279         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 280
 281         if(return_type != type_void) {
 282                 ir_type *restype = get_ir_type(return_type);
 283                 set_method_res_type(irtype, 0, restype);
 284         }
 285
 286         function_parameter_t *parameter = function_type->parameters;
 287         int                   n         = 0;
 288         for( ; parameter != NULL; parameter = parameter->next) {
 289                 ir_type *p_irtype = get_ir_type(parameter->type);
 290                 set_method_param_type(irtype, n, p_irtype);
 291                 ++n;
 292         }
 293
 294         if(function_type->variadic || function_type->unspecified_parameters) {
 295                 set_method_variadicity(irtype, variadicity_variadic);
 296         }
 297
 298         return irtype;
 299 }
 300
 301 static ir_type *create_pointer_type(pointer_type_t *type)
 302 {
 303         type_t  *points_to = type->points_to;
 304         ir_type *ir_points_to;
 305         /* Avoid endless recursion if the points_to type contains this poiner type
 306          * again (might be a struct). We therefore first create a void* pointer
 307          * and then set the real points_to type
 308          */
 309         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 310                                             ir_type_void, mode_P_data);
 311         type->type.firm_type  = ir_type;
 312
 313         ir_points_to = get_ir_type(points_to);
 314         set_pointer_points_to_type(ir_type, ir_points_to);
 315
 316         return ir_type;
 317 }
 318
 319 static ir_type *create_array_type(array_type_t *type)
 320 {
 321         type_t  *element_type    = type->element_type;
 322         ir_type *ir_element_type = get_ir_type(element_type);
 323
 324         ident   *id      = unique_ident("array");
 325         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 326
 327         if(type->size != NULL) {
 328                 int n_elements = fold_constant(type->size);
 329
 330                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 331
 332                 size_t elemsize = get_type_size_bytes(ir_element_type);
 333                 int align = get_type_alignment_bytes(ir_element_type);
 334                 if(elemsize % align > 0) {
 335                         elemsize += align - (elemsize % align);
 336                 }
 337                 set_type_size_bytes(ir_type, n_elements * elemsize);
 338                 set_type_alignment_bytes(ir_type, align);
 339                 set_type_state(ir_type, layout_fixed);
 340         }
 341
 342         return ir_type;
 343 }
 344
 345 #define INVALID_TYPE ((ir_type_ptr)-1)
 346
 347 static ir_type *create_struct_type(compound_type_t *type)
 348 {
 349         symbol_t *symbol = type->declaration->symbol;
 350         ident    *id;
 351         if(symbol != NULL) {
 352                 id = unique_ident(symbol->string);
 353         } else {
 354                 id = unique_ident("__anonymous_struct");
 355         }
 356         ir_type *ir_type = new_type_struct(id);
 357
 358         type->type.firm_type = ir_type;
 359
 360         int align_all = 1;
 361         int offset    = 0;
 362         declaration_t *entry = type->declaration->context.declarations;
 363         for( ; entry != NULL; entry = entry->next) {
 364                 if(entry->namespc != NAMESPACE_NORMAL)
 365                         continue;
 366
 367                 ident       *ident         = new_id_from_str(entry->symbol->string);
 368                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 369
 370                 int entry_size      = get_type_size_bytes(entry_ir_type);
 371                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 372                 int misalign        = offset % entry_alignment;
 373                 if (misalign != 0)
 374                         offset += entry_alignment - misalign;
 375
 376                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 377                 set_entity_offset(entity, offset);
 378                 add_struct_member(ir_type, entity);
 379                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 380                 entry->v.entity         = entity;
 381
 382                 offset += entry_size;
 383                 if(entry_alignment > align_all) {
 384                         if(entry_alignment % align_all != 0) {
 385                                 panic("Uneven alignments not supported yet");
 386                         }
 387                         align_all = entry_alignment;
 388                 }
 389         }
 390
 391         int misalign = offset % align_all;
 392         offset += misalign;
 393         set_type_alignment_bytes(ir_type, align_all);
 394         set_type_size_bytes(ir_type, offset);
 395         set_type_state(ir_type, layout_fixed);
 396
 397         return ir_type;
 398 }
 399
 400 static ir_type *create_union_type(compound_type_t *type)
 401 {
 402         declaration_t *declaration = type->declaration;
 403         symbol_t      *symbol      = declaration->symbol;
 404         ident         *id;
 405         if(symbol != NULL) {
 406                 id = unique_ident(symbol->string);
 407         } else {
 408                 id = unique_ident("__anonymous_union");
 409         }
 410         ir_type  *ir_type = new_type_union(id);
 411
 412         type->type.firm_type = ir_type;
 413
 414         int align_all = 1;
 415         int size      = 0;
 416         declaration_t *entry = declaration->context.declarations;
 417         for( ; entry != NULL; entry = entry->next) {
 418                 if(entry->namespc != NAMESPACE_NORMAL)
 419                         continue;
 420
 421                 ident       *ident         = new_id_from_str(entry->symbol->string);
 422                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 423
 424                 int entry_size      = get_type_size_bytes(entry_ir_type);
 425                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 426
 427                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 428                 add_union_member(ir_type, entity);
 429                 set_entity_offset(entity, 0);
 430                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 431                 entry->v.entity         = entity;
 432
 433                 if(entry_size > size) {
 434                         size = entry_size;
 435                 }
 436                 if(entry_alignment > align_all) {
 437                         if(entry_alignment % align_all != 0) {
 438                                 panic("Uneven alignments not supported yet");
 439                         }
 440                         align_all = entry_alignment;
 441                 }
 442         }
 443
 444         set_type_alignment_bytes(ir_type, align_all);
 445         set_type_size_bytes(ir_type, size);
 446         set_type_state(ir_type, layout_fixed);
 447
 448         return ir_type;
 449 }
 450
 451 static ir_node *expression_to_firm(const expression_t *expression);
 452 static inline ir_mode *get_ir_mode(type_t *type);
 453
 454 static ir_type *create_enum_type(enum_type_t *const type)
 455 {
 456         type->type.firm_type = ir_type_int;
 457
 458         ir_mode *const mode    = get_ir_mode((type_t*) type);
 459         tarval  *const one     = get_mode_one(mode);
 460         tarval  *      tv_next = get_tarval_null(mode);
 461
 462         declaration_t *declaration = type->declaration->next;
 463         for (; declaration != NULL; declaration = declaration->next) {
 464                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 465                         break;
 466
 467                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 468
 469                 expression_t *const init = declaration->init.enum_value;
 470                 if (init != NULL) {
 471                         ir_node *const cnst = expression_to_firm(init);
 472                         if (!is_Const(cnst)) {
 473                                 panic("couldn't fold constant");
 474                         }
 475                         tv_next = get_Const_tarval(cnst);
 476                 }
 477                 declaration->v.enum_val = tv_next;
 478                 tv_next = tarval_add(tv_next, one);
 479         }
 480
 481         return ir_type_int;
 482 }
 483
 484 static ir_type *get_ir_type(type_t *type)
 485 {
 486         assert(type != NULL);
 487
 488         type = skip_typeref(type);
 489
 490         if(type->base.firm_type != NULL) {
 491                 assert(type->base.firm_type != INVALID_TYPE);
 492                 return type->base.firm_type;
 493         }
 494
 495         ir_type *firm_type = NULL;
 496         switch(type->type) {
 497         case TYPE_ATOMIC:
 498                 firm_type = create_atomic_type(&type->atomic);
 499                 break;
 500         case TYPE_FUNCTION:
 501                 firm_type = create_method_type(&type->function);
 502                 break;
 503         case TYPE_POINTER:
 504                 firm_type = create_pointer_type(&type->pointer);
 505                 break;
 506         case TYPE_ARRAY:
 507                 firm_type = create_array_type(&type->array);
 508                 break;
 509         case TYPE_COMPOUND_STRUCT:
 510                 firm_type = create_struct_type(&type->compound);
 511                 break;
 512         case TYPE_COMPOUND_UNION:
 513                 firm_type = create_union_type(&type->compound);
 514                 break;
 515         case TYPE_ENUM:
 516                 firm_type = create_enum_type(&type->enumt);
 517                 break;
 518         case TYPE_BUILTIN:
 519                 firm_type = get_ir_type(type->builtin.real_type);
 520                 break;
 521         case TYPE_TYPEOF:
 522         case TYPE_TYPEDEF:
 523         case TYPE_INVALID:
 524                 break;
 525         }
 526         if(firm_type == NULL)
 527                 panic("unknown type found");
 528
 529         type->base.firm_type = firm_type;
 530         return firm_type;
 531 }
 532
 533 static inline ir_mode *get_ir_mode(type_t *type)
 534 {
 535         ir_type *irtype = get_ir_type(type);
 536
 537         /* firm doesn't report a mode for arrays somehow... */
 538         if(is_Array_type(irtype)) {
 539                 return mode_P;
 540         }
 541
 542         ir_mode *mode = get_type_mode(irtype);
 543         assert(mode != NULL);
 544         return mode;
 545 }
 546
 547 static ir_entity* get_function_entity(declaration_t *declaration)
 548 {
 549         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 550                 return declaration->v.entity;
 551         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 552
 553         symbol_t *symbol = declaration->symbol;
 554         ident    *id     = new_id_from_str(symbol->string);
 555
 556         ir_type  *global_type    = get_glob_type();
 557         ir_type  *ir_type_method = get_ir_type(declaration->type);
 558         assert(is_Method_type(ir_type_method));
 559
 560         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 561         set_entity_ld_ident(entity, id);
 562         if(declaration->storage_class == STORAGE_CLASS_STATIC
 563                         || declaration->is_inline) {
 564                 set_entity_visibility(entity, visibility_local);
 565         } else if(declaration->init.statement != NULL) {
 566                 set_entity_visibility(entity, visibility_external_visible);
 567         } else {
 568                 set_entity_visibility(entity, visibility_external_allocated);
 569         }
 570         set_entity_allocation(entity, allocation_static);
 571
 572         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 573         declaration->v.entity         = entity;
 574
 575         return entity;
 576 }
 577
 578 static dbg_info *get_dbg_info(const source_position_t *pos)
 579 {
 580         return (dbg_info*) pos;
 581 }
 582
 583 static ir_node *const_to_firm(const const_expression_t *cnst)
 584 {
 585         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 586         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 587
 588         char    buf[128];
 589         tarval *tv;
 590         size_t  len;
 591         if(mode_is_float(mode)) {
 592                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 593         } else {
 594                 if(mode_is_signed(mode)) {
 595                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 596                 } else {
 597                         len = snprintf(buf, sizeof(buf), "%llu",
 598                                        (unsigned long long) cnst->v.int_value);
 599                 }
 600                 tv = new_tarval_from_str(buf, len, mode);
 601         }
 602
 603         return new_d_Const(dbgi, mode, tv);
 604 }
 605
 606 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 607 {
 608         assert(entity != NULL);
 609         union symconst_symbol sym;
 610         sym.entity_p = entity;
 611         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 612 }
 613
 614 static ir_node *string_to_firm(const source_position_t *const src_pos,
 615                                const char *const id_prefix,
 616                                const char *const string)
 617 {
 618         ir_type *const global_type = get_glob_type();
 619         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 620                                                     ir_type_const_char);
 621
 622         ident     *const id     = unique_ident(id_prefix);
 623         ir_entity *const entity = new_entity(global_type, id, type);
 624         set_entity_ld_ident(entity, id);
 625         set_entity_variability(entity, variability_constant);
 626         set_entity_allocation(entity, allocation_static);
 627
 628         ir_type *const elem_type = ir_type_const_char;
 629         ir_mode *const mode      = get_type_mode(elem_type);
 630
 631         const size_t slen = strlen(string) + 1;
 632
 633         set_array_lower_bound_int(type, 0, 0);
 634         set_array_upper_bound_int(type, 0, slen);
 635         set_type_size_bytes(type, slen);
 636         set_type_state(type, layout_fixed);
 637
 638         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 639         for(size_t i = 0; i < slen; ++i) {
 640                 tvs[i] = new_tarval_from_long(string[i], mode);
 641         }
 642
 643         set_array_entity_values(entity, tvs, slen);
 644         free(tvs);
 645
 646         dbg_info *const dbgi = get_dbg_info(src_pos);
 647
 648         return create_symconst(dbgi, entity);
 649 }
 650
 651 static ir_node *string_literal_to_firm(
 652                 const string_literal_expression_t* literal)
 653 {
 654         return string_to_firm(&literal->expression.source_position, "Lstr",
 655                               literal->value);
 656 }
 657
 658 static ir_node *wide_string_literal_to_firm(
 659         const wide_string_literal_expression_t* const literal)
 660 {
 661         ir_type *const global_type = get_glob_type();
 662         ir_type *const elem_type   = ir_type_wchar_t;
 663         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 664                                                     elem_type);
 665
 666         ident     *const id     = unique_ident("Lstr");
 667         ir_entity *const entity = new_entity(global_type, id, type);
 668         set_entity_ld_ident(entity, id);
 669         set_entity_variability(entity, variability_constant);
 670         set_entity_allocation(entity, allocation_static);
 671
 672         ir_mode *const mode      = get_type_mode(elem_type);
 673
 674         const wchar_rep_t *const string = literal->value.begin;
 675         const size_t             slen   = literal->value.size;
 676
 677         set_array_lower_bound_int(type, 0, 0);
 678         set_array_upper_bound_int(type, 0, slen);
 679         set_type_size_bytes(type, slen);
 680         set_type_state(type, layout_fixed);
 681
 682         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 683         for(size_t i = 0; i < slen; ++i) {
 684                 tvs[i] = new_tarval_from_long(string[i], mode);
 685         }
 686
 687         set_array_entity_values(entity, tvs, slen);
 688         free(tvs);
 689
 690         dbg_info *const dbgi = get_dbg_info(&literal->expression.source_position);
 691
 692         return create_symconst(dbgi, entity);
 693 }
 694
 695 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 696                               dbg_info *const dbgi)
 697 {
 698         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 699                 return addr;
 700         }
 701
 702         ir_mode *const mode     = get_type_mode(irtype);
 703         ir_node *const memory   = get_store();
 704         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 705         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 706         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 707         set_store(load_mem);
 708         return load_res;
 709 }
 710
 711 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
 712 {
 713         ir_mode *mode = get_irn_mode(node);
 714
 715         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
 716                 return node;
 717         if(!mode_is_float(mode))
 718                 return node;
 719
 720         /* check if there is already a Conv */
 721         if (get_irn_op(node) == op_Conv) {
 722                 /* convert it into a strict Conv */
 723                 set_Conv_strict(node, 1);
 724                 return node;
 725         }
 726
 727         /* otherwise create a new one */
 728         return new_d_strictConv(dbgi, node, mode);
 729 }
 730
 731 static ir_node *get_global_var_address(dbg_info *const dbgi,
 732                                        const declaration_t *const decl)
 733 {
 734         assert(decl->declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
 735
 736         ir_entity *const entity = decl->v.entity;
 737         switch ((storage_class_tag_t)decl->storage_class) {
 738                 case STORAGE_CLASS_THREAD:
 739                 case STORAGE_CLASS_THREAD_EXTERN:
 740                 case STORAGE_CLASS_THREAD_STATIC: {
 741                         ir_node *const no_mem = new_NoMem();
 742                         ir_node *const tls    = get_irg_tls(current_ir_graph);
 743                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
 744                 }
 745
 746                 default:
 747                         return create_symconst(dbgi, entity);
 748         }
 749 }
 750
 751 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 752 {
 753         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 754         declaration_t *declaration = ref->declaration;
 755         type_t        *type        = skip_typeref(declaration->type);
 756
 757         switch((declaration_type_t) declaration->declaration_type) {
 758         case DECLARATION_TYPE_UNKNOWN:
 759                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 760                         break;
 761                 }
 762                 get_ir_type(type);
 763                 /* FALLTHROUGH */
 764
 765         case DECLARATION_TYPE_ENUM_ENTRY: {
 766                 ir_mode *const mode = get_ir_mode(type);
 767                 return new_Const(mode, declaration->v.enum_val);
 768         }
 769
 770         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 771                 ir_mode *mode = get_ir_mode(type);
 772                 return get_value(declaration->v.value_number, mode);
 773         }
 774         case DECLARATION_TYPE_FUNCTION: {
 775                 return create_symconst(dbgi, declaration->v.entity);
 776         }
 777         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 778                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 779                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 780                 return deref_address(irtype, addr, dbgi);
 781         }
 782
 783         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 784                 ir_entity *entity = declaration->v.entity;
 785                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 786                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 787                 ir_type   *irtype = get_entity_type(entity);
 788                 return deref_address(irtype, sel, dbgi);
 789         }
 790
 791         case DECLARATION_TYPE_COMPOUND_MEMBER:
 792         case DECLARATION_TYPE_LABEL_BLOCK:
 793                 panic("not implemented reference type");
 794         }
 795
 796         panic("reference to declaration with unknown type found");
 797 }
 798
 799 static ir_node *reference_addr(const reference_expression_t *ref)
 800 {
 801         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 802         declaration_t *declaration = ref->declaration;
 803
 804         switch((declaration_type_t) declaration->declaration_type) {
 805         case DECLARATION_TYPE_UNKNOWN:
 806                 break;
 807         case DECLARATION_TYPE_LOCAL_VARIABLE:
 808                 panic("local variable without entity has no address");
 809         case DECLARATION_TYPE_FUNCTION: {
 810                 return create_symconst(dbgi, declaration->v.entity);
 811         }
 812         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 813                 ir_node *const addr = get_global_var_address(dbgi, declaration);
 814                 return addr;
 815         }
 816         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 817                 ir_entity *entity = declaration->v.entity;
 818                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 819                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 820
 821                 return sel;
 822         }
 823
 824         case DECLARATION_TYPE_ENUM_ENTRY:
 825                 panic("trying to reference enum entry");
 826
 827         case DECLARATION_TYPE_COMPOUND_MEMBER:
 828         case DECLARATION_TYPE_LABEL_BLOCK:
 829                 panic("not implemented reference type");
 830         }
 831
 832         panic("reference to declaration with unknown type found");
 833 }
 834
 835 static ir_node *process_builtin_call(const call_expression_t *call)
 836 {
 837         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 838
 839         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 840         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
 841
 842         type_t *type = skip_typeref(builtin->expression.datatype);
 843         assert(is_type_pointer(type));
 844
 845         type_t   *function_type = skip_typeref(type->pointer.points_to);
 846         symbol_t *symbol        = builtin->symbol;
 847
 848         switch(symbol->ID) {
 849         case T___builtin_alloca: {
 850                 if(call->arguments == NULL || call->arguments->next != NULL) {
 851                         panic("invalid number of parameters on __builtin_alloca");
 852                 }
 853                 expression_t *argument = call->arguments->expression;
 854                 ir_node      *size     = expression_to_firm(argument);
 855
 856                 ir_node *store  = get_store();
 857                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 858                                               stack_alloc);
 859                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 860                 set_store(proj_m);
 861                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 862
 863                 return res;
 864         }
 865         case T___builtin_nan:
 866         case T___builtin_nanf:
 867         case T___builtin_nand: {
 868                 /* Ignore string for now... */
 869                 assert(is_type_function(function_type));
 870                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
 871                 tarval  *tv   = get_mode_NAN(mode);
 872                 ir_node *res  = new_d_Const(dbgi, mode, tv);
 873                 return res;
 874         }
 875         case T___builtin_va_end:
 876                 return NULL;
 877         default:
 878                 panic("Unsupported builtin found\n");
 879         }
 880 }
 881
 882 static ir_node *call_expression_to_firm(const call_expression_t *call)
 883 {
 884         assert(get_cur_block() != NULL);
 885
 886         expression_t *function = call->function;
 887         if(function->type == EXPR_BUILTIN_SYMBOL) {
 888                 return process_builtin_call(call);
 889         }
 890         ir_node *callee = expression_to_firm(function);
 891
 892         type_t *type = skip_typeref(function->base.datatype);
 893         assert(is_type_pointer(type));
 894         pointer_type_t *pointer_type = &type->pointer;
 895         type_t         *points_to    = skip_typeref(pointer_type->points_to);
 896         assert(is_type_function(points_to));
 897         function_type_t *function_type = &points_to->function;
 898
 899         int              n_parameters = 0;
 900         call_argument_t *argument     = call->arguments;
 901         for( ; argument != NULL; argument = argument->next) {
 902                 ++n_parameters;
 903         }
 904
 905         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 906
 907         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 908         ir_type *new_method_type = NULL;
 909         if(function_type->variadic || function_type->unspecified_parameters) {
 910                 /* we need to construct a new method type matching the call
 911                  * arguments... */
 912                 int n_res       = get_method_n_ress(ir_method_type);
 913                 new_method_type = new_type_method(unique_ident("calltype"),
 914                                                   n_parameters, n_res);
 915                 set_method_calling_convention(new_method_type,
 916                                get_method_calling_convention(ir_method_type));
 917                 set_method_additional_properties(new_method_type,
 918                                get_method_additional_properties(ir_method_type));
 919
 920                 for(int i = 0; i < n_res; ++i) {
 921                         set_method_res_type(new_method_type, i,
 922                                             get_method_res_type(ir_method_type, i));
 923                 }
 924         }
 925         ir_node *in[n_parameters];
 926
 927         argument = call->arguments;
 928         int n = 0;
 929         for( ; argument != NULL; argument = argument->next) {
 930                 expression_t *expression = argument->expression;
 931                 ir_node      *arg_node   = expression_to_firm(expression);
 932
 933                 arg_node = do_strict_conv(dbgi, arg_node);
 934
 935                 in[n] = arg_node;
 936                 if(new_method_type != NULL) {
 937                         ir_type *irtype = get_ir_type(expression->base.datatype);
 938                         set_method_param_type(new_method_type, n, irtype);
 939                 }
 940
 941                 n++;
 942         }
 943         assert(n == n_parameters);
 944
 945         if(new_method_type != NULL)
 946                 ir_method_type = new_method_type;
 947
 948         ir_node  *store = get_store();
 949         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 950                                      ir_method_type);
 951         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 952         set_store(mem);
 953
 954         type_t  *return_type = skip_typeref(function_type->return_type);
 955         ir_node *result      = NULL;
 956
 957         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
 958                 ir_mode *mode;
 959                 if(is_type_scalar(return_type)) {
 960                         mode = get_ir_mode(return_type);
 961                 } else {
 962                         mode = mode_P_data;
 963                 }
 964                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 965                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 966         }
 967
 968         return result;
 969 }
 970
 971 static void statement_to_firm(statement_t *statement);
 972 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
 973
 974 static ir_node *expression_to_addr(const expression_t *expression);
 975 static void create_condition_evaluation(const expression_t *expression,
 976                                         ir_node *true_block,
 977                                         ir_node *false_block);
 978
 979 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
 980                          ir_node *value)
 981 {
 982         value = do_strict_conv(dbgi, value);
 983
 984         ir_node  *memory = get_store();
 985
 986         if(is_type_scalar(type)) {
 987                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 988                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 989                 set_store(store_mem);
 990         } else {
 991                 ir_type *irtype    = get_ir_type(type);
 992                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
 993                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
 994                 set_store(copyb_mem);
 995         }
 996 }
 997
 998 static void set_value_for_expression(const expression_t *expression,
 999                                      ir_node *value)
1000 {
1001         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1002         value          = do_strict_conv(dbgi, value);
1003
1004         if(expression->type == EXPR_REFERENCE) {
1005                 reference_expression_t *ref = (reference_expression_t*) expression;
1006
1007                 declaration_t *declaration = ref->declaration;
1008                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
1009                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1010                         set_value(declaration->v.value_number, value);
1011                         return;
1012                 }
1013         }
1014
1015         ir_node *addr = expression_to_addr(expression);
1016         type_t  *type = skip_typeref(expression->base.datatype);
1017         assign_value(dbgi, addr, type, value);
1018 }
1019
1020 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1021 {
1022         ir_mode *value_mode = get_irn_mode(value);
1023
1024         if (value_mode == dest_mode || is_Bad(value))
1025                 return value;
1026
1027         if(dest_mode == mode_b) {
1028                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1029                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1030                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1031                 return proj;
1032         }
1033
1034         return new_d_Conv(dbgi, value, dest_mode);
1035 }
1036
1037 static ir_node *create_incdec(const unary_expression_t *expression)
1038 {
1039         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1040         type_t       *type  = skip_typeref(expression->expression.datatype);
1041         ir_mode      *mode  = get_ir_mode(type);
1042         expression_t *value = expression->value;
1043
1044         ir_node *value_node = expression_to_firm(value);
1045
1046         ir_node *offset;
1047         if(is_type_pointer(type)) {
1048                 pointer_type_t *pointer_type = &type->pointer;
1049                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1050                 offset = new_Const_long(mode_Is, elem_size);
1051         } else {
1052                 assert(is_type_arithmetic(type));
1053                 offset = new_Const(mode, get_mode_one(mode));
1054         }
1055
1056         switch(expression->expression.type) {
1057         case EXPR_UNARY_POSTFIX_INCREMENT: {
1058                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1059                 set_value_for_expression(value, new_value);
1060                 return value_node;
1061         }
1062         case EXPR_UNARY_POSTFIX_DECREMENT: {
1063                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1064                 set_value_for_expression(value, new_value);
1065                 return value_node;
1066         }
1067         case EXPR_UNARY_PREFIX_INCREMENT: {
1068                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1069                 set_value_for_expression(value, new_value);
1070                 return new_value;
1071         }
1072         case EXPR_UNARY_PREFIX_DECREMENT: {
1073                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1074                 set_value_for_expression(value, new_value);
1075                 return new_value;
1076         }
1077         default:
1078                 panic("no incdec expr in create_incdec");
1079                 return NULL;
1080         }
1081 }
1082
1083 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1084 {
1085         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1086         type_t   *type = skip_typeref(expression->expression.datatype);
1087         ir_mode  *mode = get_ir_mode(type);
1088
1089         if(expression->expression.type == EXPR_UNARY_TAKE_ADDRESS)
1090                 return expression_to_addr(expression->value);
1091
1092         const expression_t *value      = expression->value;
1093         ir_node            *value_node = expression_to_firm(value);
1094
1095         switch(expression->expression.type) {
1096         case EXPR_UNARY_NEGATE:
1097                 return new_d_Minus(dbgi, value_node, mode);
1098         case EXPR_UNARY_PLUS:
1099                 return value_node;
1100         case EXPR_UNARY_BITWISE_NEGATE:
1101                 return new_d_Not(dbgi, value_node, mode);
1102         case EXPR_UNARY_NOT: {
1103                 if(get_irn_mode(value_node) != mode_b) {
1104                         value_node = create_conv(dbgi, value_node, mode_b);
1105                 }
1106                 value_node = new_d_Not(dbgi, value_node, mode_b);
1107                 if(mode != mode_b) {
1108                         value_node = create_conv(dbgi, value_node, mode);
1109                 }
1110                 return value_node;
1111         }
1112         case EXPR_UNARY_DEREFERENCE: {
1113                 type_t  *value_type = skip_typeref(value->base.datatype);
1114                 ir_type *irtype     = get_ir_type(value_type);
1115                 assert(is_Pointer_type(irtype));
1116                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1117                 return deref_address(points_to, value_node, dbgi);
1118         }
1119         case EXPR_UNARY_POSTFIX_INCREMENT:
1120         case EXPR_UNARY_POSTFIX_DECREMENT:
1121         case EXPR_UNARY_PREFIX_INCREMENT:
1122         case EXPR_UNARY_PREFIX_DECREMENT:
1123                 return create_incdec(expression);
1124         case EXPR_UNARY_CAST: {
1125                 ir_node *node = create_conv(dbgi, value_node, get_ir_mode(type));
1126                 node = do_strict_conv(dbgi, node);
1127                 return node;
1128         }
1129         case EXPR_UNARY_CAST_IMPLICIT:
1130                 return create_conv(dbgi, value_node, get_ir_mode(type));
1131
1132         default:
1133                 break;
1134         }
1135         panic("invalid UNEXPR type found");
1136 }
1137
1138 static long get_pnc(const expression_type_t type)
1139 {
1140         switch(type) {
1141         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1142         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1143         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1144         case EXPR_BINARY_ISLESS:
1145         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1146         case EXPR_BINARY_ISLESSEQUAL:
1147         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1148         case EXPR_BINARY_ISGREATER:
1149         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1150         case EXPR_BINARY_ISGREATEREQUAL:
1151         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1152         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1153
1154         default:
1155                 break;
1156         }
1157         panic("trying to get pn_Cmp from non-comparison binexpr type");
1158 }
1159
1160 static ir_node *create_lazy_op(const binary_expression_t *expression)
1161 {
1162         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1163         type_t   *type = expression->expression.datatype;
1164         ir_mode  *mode = get_ir_mode(type);
1165
1166         ir_node *cur_block = get_cur_block();
1167
1168         ir_node *one_block = new_immBlock();
1169         ir_node *one       = new_Const(mode, get_mode_one(mode));
1170         ir_node *jmp_one   = new_d_Jmp(dbgi);
1171
1172         ir_node *zero_block = new_immBlock();
1173         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1174         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1175
1176         set_cur_block(cur_block);
1177         create_condition_evaluation((const expression_t*) expression,
1178                                     one_block, zero_block);
1179         mature_immBlock(one_block);
1180         mature_immBlock(zero_block);
1181
1182         ir_node *common_block = new_immBlock();
1183         add_immBlock_pred(common_block, jmp_one);
1184         add_immBlock_pred(common_block, jmp_zero);
1185         mature_immBlock(common_block);
1186
1187         ir_node *in[2] = { one, zero };
1188         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1189
1190         return val;
1191 }
1192
1193 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1194                                             ir_node *right, ir_mode *mode);
1195
1196 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1197                                         create_arithmetic_func func)
1198 {
1199         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1200         ir_node  *left  = expression_to_firm(expression->left);
1201         ir_node  *right = expression_to_firm(expression->right);
1202         type_t   *type  = expression->right->base.datatype;
1203         /* be careful with the modes, because in arithmetic assign nodes only
1204          * the right operand has the mode of the arithmetic already */
1205         ir_mode  *mode  = get_ir_mode(type);
1206         left            = create_conv(dbgi, left, mode);
1207         ir_node  *res   = func(dbgi, left, right, mode);
1208
1209         return res;
1210 }
1211
1212 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1213                                    ir_node  *      integer,
1214                                    type_t   *const type,
1215                                    dbg_info *const dbgi,
1216                                    const create_arithmetic_func func)
1217 {
1218         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1219         type_t         *const points_to    = pointer_type->points_to;
1220         const unsigned        elem_size    = get_type_size(points_to);
1221
1222         assert(elem_size >= 1);
1223         if (elem_size > 1) {
1224                 integer             = create_conv(dbgi, integer, mode_Is);
1225                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1226                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1227                 integer = mul;
1228         }
1229
1230         ir_mode *const mode = get_ir_mode(type);
1231         return func(dbgi, pointer, integer, mode);
1232 }
1233
1234 static ir_node *create_arithmetic_assign_binop(
1235                 const binary_expression_t *expression, create_arithmetic_func func)
1236 {
1237         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1238         type_t   *const type = skip_typeref(expression->expression.datatype);
1239         ir_node  *value;
1240
1241         if (is_type_pointer(type)) {
1242                 ir_node        *const pointer = expression_to_firm(expression->left);
1243                 ir_node        *      integer = expression_to_firm(expression->right);
1244                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1245         } else {
1246                 value = create_arithmetic_binop(expression, func);
1247         }
1248
1249         ir_mode  *const mode = get_ir_mode(type);
1250         value = create_conv(dbgi, value, mode);
1251         set_value_for_expression(expression->left, value);
1252
1253         return value;
1254 }
1255
1256 static ir_node *create_add(const binary_expression_t *expression)
1257 {
1258         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1259         ir_node  *left  = expression_to_firm(expression->left);
1260         ir_node  *right = expression_to_firm(expression->right);
1261         type_t   *type  = expression->expression.datatype;
1262
1263         expression_t *expr_left  = expression->left;
1264         expression_t *expr_right = expression->right;
1265         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1266         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1267
1268         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1269                 ir_mode *const mode = get_ir_mode(type);
1270                 return new_d_Add(dbgi, left, right, mode);
1271         }
1272
1273         if (is_type_pointer(type_left)) {
1274                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1275         } else {
1276                 assert(is_type_pointer(type_right));
1277                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1278         }
1279 }
1280
1281 static ir_node *create_sub(const binary_expression_t *expression)
1282 {
1283         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1284         expression_t *const expr_left  = expression->left;
1285         expression_t *const expr_right = expression->right;
1286         ir_node      *const left       = expression_to_firm(expr_left);
1287         ir_node      *const right      = expression_to_firm(expr_right);
1288         type_t       *const type       = expression->expression.datatype;
1289         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1290         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1291
1292         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1293                 ir_mode *const mode = get_ir_mode(type);
1294                 return new_d_Sub(dbgi, left, right, mode);
1295         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1296                 const pointer_type_t *const ptr_type = &type_left->pointer;
1297                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1298                 ir_mode *const mode   = get_ir_mode(type);
1299                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1300                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1301                 ir_node *const no_mem = new_NoMem();
1302                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1303                                                   op_pin_state_floats);
1304                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1305         }
1306
1307         assert(is_type_pointer(type_left));
1308         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1309 }
1310
1311 static ir_node *create_shift(const binary_expression_t *expression)
1312 {
1313         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1314         ir_node  *left  = expression_to_firm(expression->left);
1315         ir_node  *right = expression_to_firm(expression->right);
1316         type_t   *type  = expression->expression.datatype;
1317         ir_mode  *mode  = get_ir_mode(type);
1318
1319         /* firm always wants the shift count to be unsigned */
1320         right = create_conv(dbgi, right, mode_Iu);
1321
1322         ir_node *res;
1323
1324         switch(expression->expression.type) {
1325         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1326         case EXPR_BINARY_SHIFTLEFT:
1327                 res = new_d_Shl(dbgi, left, right, mode);
1328                 break;
1329         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1330         case EXPR_BINARY_SHIFTRIGHT: {
1331                  expression_t *expr_left = expression->left;
1332                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1333
1334                  if(is_type_signed(type_left)) {
1335                         res = new_d_Shrs(dbgi, left, right, mode);
1336                  } else {
1337                          res = new_d_Shr(dbgi, left, right, mode);
1338                  }
1339                  break;
1340         }
1341         default:
1342                 panic("create shift op called for non-shift op");
1343         }
1344
1345         return res;
1346 }
1347
1348
1349 static ir_node *create_divmod(const binary_expression_t *expression)
1350 {
1351         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1352         ir_node  *left  = expression_to_firm(expression->left);
1353         ir_node  *right = expression_to_firm(expression->right);
1354         ir_node  *pin   = new_Pin(new_NoMem());
1355         /* be careful with the modes, because in arithmetic assign nodes only
1356          * the right operand has the mode of the arithmetic already */
1357         type_t   *type  = expression->right->base.datatype;
1358         ir_mode  *mode  = get_ir_mode(type);
1359         left            = create_conv(dbgi, left, mode);
1360         ir_node  *op;
1361         ir_node  *res;
1362
1363         switch (expression->expression.type) {
1364         case EXPR_BINARY_DIV:
1365         case EXPR_BINARY_DIV_ASSIGN:
1366                 if(mode_is_float(mode)) {
1367                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1368                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1369                 } else {
1370                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1371                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1372                 }
1373                 break;
1374
1375         case EXPR_BINARY_MOD:
1376         case EXPR_BINARY_MOD_ASSIGN:
1377                 assert(!mode_is_float(mode));
1378                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1379                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1380                 break;
1381
1382         default: panic("unexpected binary expression type in create_divmod()");
1383         }
1384
1385         return res;
1386 }
1387
1388 static ir_node *create_arithmetic_assign_divmod(
1389                 const binary_expression_t *expression)
1390 {
1391         ir_node  *      value = create_divmod(expression);
1392         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1393         type_t   *const type  = expression->expression.datatype;
1394         ir_mode  *const mode  = get_ir_mode(type);
1395
1396         assert(type->type != TYPE_POINTER);
1397
1398         value = create_conv(dbgi, value, mode);
1399         set_value_for_expression(expression->left, value);
1400
1401         return value;
1402 }
1403
1404 static ir_node *create_arithmetic_assign_shift(
1405                 const binary_expression_t *expression)
1406 {
1407         ir_node  *      value = create_shift(expression);
1408         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1409         type_t   *const type  = expression->expression.datatype;
1410         ir_mode  *const mode  = get_ir_mode(type);
1411
1412         value = create_conv(dbgi, value, mode);
1413         set_value_for_expression(expression->left, value);
1414
1415         return value;
1416 }
1417
1418 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1419 {
1420         expression_type_t type = expression->expression.type;
1421
1422         switch(type) {
1423         case EXPR_BINARY_EQUAL:
1424         case EXPR_BINARY_NOTEQUAL:
1425         case EXPR_BINARY_LESS:
1426         case EXPR_BINARY_LESSEQUAL:
1427         case EXPR_BINARY_GREATER:
1428         case EXPR_BINARY_GREATEREQUAL:
1429         case EXPR_BINARY_ISGREATER:
1430         case EXPR_BINARY_ISGREATEREQUAL:
1431         case EXPR_BINARY_ISLESS:
1432         case EXPR_BINARY_ISLESSEQUAL:
1433         case EXPR_BINARY_ISLESSGREATER:
1434         case EXPR_BINARY_ISUNORDERED: {
1435                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1436                 ir_node *left  = expression_to_firm(expression->left);
1437                 ir_node *right = expression_to_firm(expression->right);
1438                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1439                 long     pnc   = get_pnc(type);
1440                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1441                 return proj;
1442         }
1443         case EXPR_BINARY_ASSIGN: {
1444                 ir_node *right = expression_to_firm(expression->right);
1445                 set_value_for_expression(expression->left, right);
1446
1447                 return right;
1448         }
1449         case EXPR_BINARY_ADD:
1450                 return create_add(expression);
1451         case EXPR_BINARY_SUB:
1452                 return create_sub(expression);
1453         case EXPR_BINARY_MUL:
1454                 return create_arithmetic_binop(expression, new_d_Mul);
1455         case EXPR_BINARY_BITWISE_AND:
1456                 return create_arithmetic_binop(expression, new_d_And);
1457         case EXPR_BINARY_BITWISE_OR:
1458                 return create_arithmetic_binop(expression, new_d_Or);
1459         case EXPR_BINARY_BITWISE_XOR:
1460                 return create_arithmetic_binop(expression, new_d_Eor);
1461         case EXPR_BINARY_SHIFTLEFT:
1462         case EXPR_BINARY_SHIFTRIGHT:
1463                 return create_shift(expression);
1464         case EXPR_BINARY_DIV:
1465         case EXPR_BINARY_MOD:
1466                 return create_divmod(expression);
1467         case EXPR_BINARY_LOGICAL_AND:
1468         case EXPR_BINARY_LOGICAL_OR:
1469                 return create_lazy_op(expression);
1470         case EXPR_BINARY_COMMA:
1471                 expression_to_firm(expression->left);
1472                 return expression_to_firm(expression->right);
1473         case EXPR_BINARY_ADD_ASSIGN:
1474                 return create_arithmetic_assign_binop(expression, new_d_Add);
1475         case EXPR_BINARY_SUB_ASSIGN:
1476                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1477         case EXPR_BINARY_MUL_ASSIGN:
1478                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1479         case EXPR_BINARY_DIV_ASSIGN:
1480                 return create_arithmetic_assign_divmod(expression);
1481         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1482                 return create_arithmetic_assign_binop(expression, new_d_And);
1483         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1484                 return create_arithmetic_assign_binop(expression, new_d_Or);
1485         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1486                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1487         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1488         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1489                 return create_arithmetic_assign_shift(expression);
1490         default:
1491                 panic("TODO binexpr type");
1492         }
1493 }
1494
1495 static ir_node *array_access_addr(const array_access_expression_t *expression)
1496 {
1497         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1498         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1499         ir_node  *offset    = expression_to_firm(expression->index);
1500         offset              = create_conv(dbgi, offset, mode_Iu);
1501
1502         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1503         assert(is_type_pointer(ref_type));
1504         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1505
1506         unsigned elem_size       = get_type_size(pointer_type->points_to);
1507         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1508         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1509                                              mode_Iu);
1510         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1511
1512         return result;
1513 }
1514
1515 static ir_node *array_access_to_firm(
1516                 const array_access_expression_t *expression)
1517 {
1518         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1519         ir_node  *addr   = array_access_addr(expression);
1520         type_t   *type   = revert_automatic_type_conversion(
1521                         (const expression_t*) expression);
1522         type             = skip_typeref(type);
1523         ir_type  *irtype = get_ir_type(type);
1524
1525         return deref_address(irtype, addr, dbgi);
1526 }
1527
1528 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1529 {
1530         type_t *type = expression->type;
1531         if(type == NULL) {
1532                 type = expression->size_expression->base.datatype;
1533                 assert(type != NULL);
1534         }
1535
1536         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1537         unsigned  size      = get_type_size(type);
1538         ir_node  *size_node = new_Const_long(mode, size);
1539
1540         return size_node;
1541 }
1542
1543 static tarval *try_fold_constant(const expression_t *expression)
1544 {
1545         ir_graph *old_current_ir_graph = current_ir_graph;
1546         if(current_ir_graph == NULL) {
1547                 current_ir_graph = get_const_code_irg();
1548         }
1549
1550         ir_node *cnst = expression_to_firm(expression);
1551         current_ir_graph = old_current_ir_graph;
1552
1553         if(!is_Const(cnst)) {
1554                 return NULL;
1555         }
1556
1557         tarval *tv = get_Const_tarval(cnst);
1558         if(!tarval_is_long(tv)) {
1559                 return NULL;
1560         }
1561
1562         return tv;
1563 }
1564
1565 static long fold_constant(const expression_t *expression)
1566 {
1567         tarval *tv = try_fold_constant(expression);
1568         if(tv == NULL) {
1569                 panic("couldn't fold constantl");
1570         }
1571
1572         return get_tarval_long(tv);
1573 }
1574
1575 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1576 {
1577         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1578
1579         /* first try to fold a constant condition */
1580         tarval *tv = try_fold_constant(expression->condition);
1581         if(tv != NULL) {
1582                 long val = get_tarval_long(tv);
1583                 if(val) {
1584                         return expression_to_firm(expression->true_expression);
1585                 } else {
1586                         return expression_to_firm(expression->false_expression);
1587                 }
1588         }
1589
1590         ir_node *cur_block   = get_cur_block();
1591
1592         /* create the true block */
1593         ir_node *true_block  = new_immBlock();
1594
1595         ir_node *true_val = expression_to_firm(expression->true_expression);
1596         ir_node *true_jmp = new_Jmp();
1597
1598         /* create the false block */
1599         ir_node *false_block = new_immBlock();
1600
1601         ir_node *false_val = expression_to_firm(expression->false_expression);
1602         ir_node *false_jmp = new_Jmp();
1603
1604         /* create the condition evaluation */
1605         set_cur_block(cur_block);
1606         create_condition_evaluation(expression->condition, true_block, false_block);
1607         mature_immBlock(true_block);
1608         mature_immBlock(false_block);
1609
1610         /* create the common block */
1611         ir_node *common_block = new_immBlock();
1612         add_immBlock_pred(common_block, true_jmp);
1613         add_immBlock_pred(common_block, false_jmp);
1614         mature_immBlock(common_block);
1615
1616         /* TODO improve static semantics, so either both or no values are NULL */
1617         if (true_val == NULL || false_val == NULL)
1618                 return NULL;
1619
1620         ir_node *in[2] = { true_val, false_val };
1621         ir_mode *mode  = get_irn_mode(true_val);
1622         assert(get_irn_mode(false_val) == mode);
1623         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1624
1625         return val;
1626 }
1627
1628 static ir_node *select_addr(const select_expression_t *expression)
1629 {
1630         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1631
1632         ir_node *compound_addr = expression_to_firm(expression->compound);
1633
1634         declaration_t *entry = expression->compound_entry;
1635         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1636         ir_entity     *entity = entry->v.entity;
1637
1638         assert(entity != NULL);
1639
1640         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1641
1642         return sel;
1643 }
1644
1645 static ir_node *select_to_firm(const select_expression_t *expression)
1646 {
1647         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1648         ir_node  *addr   = select_addr(expression);
1649         type_t   *type   = revert_automatic_type_conversion(
1650                         (const expression_t*) expression);
1651         type             = skip_typeref(type);
1652         ir_type  *irtype = get_ir_type(type);
1653
1654         return deref_address(irtype, addr, dbgi);
1655 }
1656
1657 /* Values returned by __builtin_classify_type. */
1658 typedef enum gcc_type_class
1659 {
1660         no_type_class = -1,
1661         void_type_class,
1662         integer_type_class,
1663         char_type_class,
1664         enumeral_type_class,
1665         boolean_type_class,
1666         pointer_type_class,
1667         reference_type_class,
1668         offset_type_class,
1669         real_type_class,
1670         complex_type_class,
1671         function_type_class,
1672         method_type_class,
1673         record_type_class,
1674         union_type_class,
1675         array_type_class,
1676         string_type_class,
1677         set_type_class,
1678         file_type_class,
1679         lang_type_class
1680 } gcc_type_class;
1681
1682 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1683 {
1684         const type_t *const type = expr->type_expression->base.datatype;
1685
1686         gcc_type_class tc;
1687         switch (type->type)
1688         {
1689                 case TYPE_ATOMIC: {
1690                         const atomic_type_t *const atomic_type = &type->atomic;
1691                         switch (atomic_type->atype) {
1692                                 // should not be reached
1693                                 case ATOMIC_TYPE_INVALID:
1694                                         tc = no_type_class;
1695                                         break;
1696
1697                                 // gcc cannot do that
1698                                 case ATOMIC_TYPE_VOID:
1699                                         tc = void_type_class;
1700                                         break;
1701
1702                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1703                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1704                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1705                                 case ATOMIC_TYPE_SHORT:
1706                                 case ATOMIC_TYPE_USHORT:
1707                                 case ATOMIC_TYPE_INT:
1708                                 case ATOMIC_TYPE_UINT:
1709                                 case ATOMIC_TYPE_LONG:
1710                                 case ATOMIC_TYPE_ULONG:
1711                                 case ATOMIC_TYPE_LONGLONG:
1712                                 case ATOMIC_TYPE_ULONGLONG:
1713                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1714                                         tc = integer_type_class;
1715                                         break;
1716
1717                                 case ATOMIC_TYPE_FLOAT:
1718                                 case ATOMIC_TYPE_DOUBLE:
1719                                 case ATOMIC_TYPE_LONG_DOUBLE:
1720                                         tc = real_type_class;
1721                                         break;
1722
1723 #ifdef PROVIDE_COMPLEX
1724                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1725                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1726                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1727                                         tc = complex_type_class;
1728                                         break;
1729                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1730                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1731                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1732                                         tc = complex_type_class;
1733                                         break;
1734 #endif
1735
1736                                 default:
1737                                         panic("Unimplemented case in classify_type_to_firm().");
1738                         }
1739                         break;
1740                 }
1741
1742                 case TYPE_ARRAY:           // gcc handles this as pointer
1743                 case TYPE_FUNCTION:        // gcc handles this as pointer
1744                 case TYPE_POINTER:         tc = pointer_type_class; break;
1745                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1746                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1747
1748                 // gcc handles this as integer
1749                 case TYPE_ENUM:            tc = integer_type_class; break;
1750
1751                 default:
1752                         panic("Unimplemented case in classify_type_to_firm().");
1753         }
1754
1755         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1756         ir_mode  *const mode = mode_Is;
1757         tarval   *const tv   = new_tarval_from_long(tc, mode);
1758         return new_d_Const(dbgi, mode, tv);
1759 }
1760
1761 static ir_node *function_name_to_firm(
1762                 const string_literal_expression_t *const expr)
1763 {
1764         if (current_function_name == NULL) {
1765                 const source_position_t *const src_pos =
1766                         &expr->expression.source_position;
1767                 const char *const name = current_function_decl->symbol->string;
1768                 current_function_name = string_to_firm(src_pos, "__func__", name);
1769         }
1770
1771         return current_function_name;
1772 }
1773
1774 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1775 {
1776         statement_t *statement = expr->statement;
1777
1778         assert(statement->type == STATEMENT_COMPOUND);
1779         return compound_statement_to_firm((compound_statement_t*) statement);
1780 }
1781
1782 static ir_node *va_start_expression_to_firm(
1783         const va_start_expression_t *const expr)
1784 {
1785         ir_type   *const method_type = get_ir_type(current_function_decl->type);
1786         int        const n           = get_method_n_params(method_type) - 1;
1787         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
1788         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
1789         dbg_info  *const dbgi        =
1790                 get_dbg_info(&expr->expression.source_position);
1791         ir_node   *const no_mem      = new_NoMem();
1792         ir_node   *const arg_sel     =
1793                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
1794
1795         size_t     const parm_size   = get_type_size(expr->parameter->type);
1796         ir_node   *const cnst        = new_Const_long(mode_Iu, parm_size);
1797         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
1798         set_value_for_expression(expr->ap, add);
1799
1800         return NULL;
1801 }
1802
1803 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
1804 {
1805         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
1806         ir_node  *const ap     = expression_to_firm(expr->ap);
1807         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
1808         ir_node  *const res    = deref_address(irtype, ap, dbgi);
1809
1810         size_t     const parm_size   = get_type_size(expr->expression.datatype);
1811         ir_node   *const cnst        = new_Const_long(mode_Iu, parm_size);
1812         ir_node   *const add         = new_d_Add(dbgi, ap, cnst, mode_P_data);
1813         set_value_for_expression(expr->ap, add);
1814
1815         return res;
1816 }
1817
1818 static ir_node *dereference_addr(const unary_expression_t *const expression)
1819 {
1820         assert(expression->expression.type == EXPR_UNARY_DEREFERENCE);
1821         return expression_to_firm(expression->value);
1822 }
1823
1824 static ir_node *expression_to_addr(const expression_t *expression)
1825 {
1826         switch(expression->type) {
1827         case EXPR_REFERENCE:
1828                 return reference_addr(&expression->reference);
1829         case EXPR_ARRAY_ACCESS:
1830                 return array_access_addr(&expression->array_access);
1831         case EXPR_SELECT:
1832                 return select_addr(&expression->select);
1833         case EXPR_CALL:
1834                 return call_expression_to_firm(&expression->call);
1835         case EXPR_UNARY_DEREFERENCE: {
1836                 return dereference_addr(&expression->unary);
1837         }
1838         default:
1839                 break;
1840         }
1841         panic("trying to get address of non-lvalue");
1842 }
1843
1844 static ir_node *_expression_to_firm(const expression_t *expression)
1845 {
1846         switch(expression->type) {
1847         case EXPR_CONST:
1848                 return const_to_firm(&expression->conste);
1849         case EXPR_STRING_LITERAL:
1850                 return string_literal_to_firm(&expression->string);
1851         case EXPR_WIDE_STRING_LITERAL:
1852                 return wide_string_literal_to_firm(&expression->wide_string);
1853         case EXPR_REFERENCE:
1854                 return reference_expression_to_firm(&expression->reference);
1855         case EXPR_CALL:
1856                 return call_expression_to_firm(&expression->call);
1857         EXPR_UNARY_CASES
1858                 return unary_expression_to_firm(&expression->unary);
1859         EXPR_BINARY_CASES
1860                 return binary_expression_to_firm(&expression->binary);
1861         case EXPR_ARRAY_ACCESS:
1862                 return array_access_to_firm(&expression->array_access);
1863         case EXPR_SIZEOF:
1864                 return sizeof_to_firm(&expression->sizeofe);
1865         case EXPR_CONDITIONAL:
1866                 return conditional_to_firm(&expression->conditional);
1867         case EXPR_SELECT:
1868                 return select_to_firm(&expression->select);
1869         case EXPR_CLASSIFY_TYPE:
1870                 return classify_type_to_firm(&expression->classify_type);
1871         case EXPR_FUNCTION:
1872         case EXPR_PRETTY_FUNCTION:
1873                 return function_name_to_firm(&expression->string);
1874         case EXPR_STATEMENT:
1875                 return statement_expression_to_firm(&expression->statement);
1876         case EXPR_VA_START:
1877                 return va_start_expression_to_firm(&expression->va_starte);
1878         case EXPR_VA_ARG:
1879                 return va_arg_expression_to_firm(&expression->va_arge);
1880         case EXPR_OFFSETOF:
1881         case EXPR_BUILTIN_SYMBOL:
1882                 panic("unimplemented expression found");
1883
1884         case EXPR_UNKNOWN:
1885         case EXPR_INVALID:
1886                 break;
1887         }
1888         panic("invalid expression found");
1889 }
1890
1891 static ir_node *expression_to_firm(const expression_t *expression)
1892 {
1893         ir_node *res = _expression_to_firm(expression);
1894
1895         if(res != NULL && get_irn_mode(res) == mode_b) {
1896                 ir_mode *mode = get_ir_mode(expression->base.datatype);
1897                 res           = create_conv(NULL, res, mode);
1898         }
1899
1900         return res;
1901 }
1902
1903 static ir_node *expression_to_modeb(const expression_t *expression)
1904 {
1905         ir_node *res = _expression_to_firm(expression);
1906         res          = create_conv(NULL, res, mode_b);
1907
1908         return res;
1909 }
1910
1911 /**
1912  * create a short-circuit expression evaluation that tries to construct
1913  * efficient control flow structures for &&, || and ! expressions
1914  */
1915 static void create_condition_evaluation(const expression_t *expression,
1916                                         ir_node *true_block,
1917                                         ir_node *false_block)
1918 {
1919         switch(expression->type) {
1920         case EXPR_UNARY_NOT: {
1921                 const unary_expression_t *unary_expression = &expression->unary;
1922                 create_condition_evaluation(unary_expression->value, false_block,
1923                                             true_block);
1924                 return;
1925         }
1926         case EXPR_BINARY_LOGICAL_AND: {
1927                 const binary_expression_t *binary_expression = &expression->binary;
1928
1929                 ir_node *cur_block   = get_cur_block();
1930                 ir_node *extra_block = new_immBlock();
1931                 set_cur_block(cur_block);
1932                 create_condition_evaluation(binary_expression->left, extra_block,
1933                                             false_block);
1934                 mature_immBlock(extra_block);
1935                 set_cur_block(extra_block);
1936                 create_condition_evaluation(binary_expression->right, true_block,
1937                                             false_block);
1938                 return;
1939         }
1940         case EXPR_BINARY_LOGICAL_OR: {
1941                 const binary_expression_t *binary_expression = &expression->binary;
1942
1943                 ir_node *cur_block   = get_cur_block();
1944                 ir_node *extra_block = new_immBlock();
1945                 set_cur_block(cur_block);
1946                 create_condition_evaluation(binary_expression->left, true_block,
1947                                             extra_block);
1948                 mature_immBlock(extra_block);
1949                 set_cur_block(extra_block);
1950                 create_condition_evaluation(binary_expression->right, true_block,
1951                                             false_block);
1952                 return;
1953         }
1954         default:
1955                 break;
1956         }
1957
1958         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
1959         ir_node  *condition  = expression_to_modeb(expression);
1960         ir_node  *cond       = new_d_Cond(dbgi, condition);
1961         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1962         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1963
1964         add_immBlock_pred(true_block, true_proj);
1965         add_immBlock_pred(false_block, false_proj);
1966
1967         set_cur_block(NULL);
1968 }
1969
1970
1971
1972 static void create_declaration_entity(declaration_t *declaration,
1973                                       declaration_type_t declaration_type,
1974                                       ir_type *parent_type)
1975 {
1976         ident     *id     = new_id_from_str(declaration->symbol->string);
1977         ir_type   *irtype = get_ir_type(declaration->type);
1978         ir_entity *entity = new_entity(parent_type, id, irtype);
1979         set_entity_ld_ident(entity, id);
1980
1981         declaration->declaration_type = (unsigned char) declaration_type;
1982         declaration->v.entity         = entity;
1983         set_entity_variability(entity, variability_uninitialized);
1984         if(parent_type == get_tls_type())
1985                 set_entity_allocation(entity, allocation_automatic);
1986         else if(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE)
1987                 set_entity_allocation(entity, allocation_static);
1988         /* TODO: visibility? */
1989 }
1990
1991 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1992
1993 enum compound_graph_entry_type_t {
1994         COMPOUND_GRAPH_ENTRY_ARRAY,
1995         COMPOUND_GRAPH_ENTRY_COMPOUND
1996 };
1997
1998 struct compound_graph_path_entry_t {
1999         int type;
2000         union {
2001                 ir_entity *entity;
2002                 int        array_index;
2003         } v;
2004         compound_graph_path_entry_t *prev;
2005 };
2006
2007 static void create_initializer_object(initializer_t *initializer, type_t *type,
2008                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2009
2010 static compound_graph_path *create_compound_path(ir_type *type,
2011                 compound_graph_path_entry_t *entry, int len)
2012 {
2013         compound_graph_path *path = new_compound_graph_path(type, len);
2014
2015         int i = len - 1;
2016         for( ; entry != NULL; entry = entry->prev, --i) {
2017                 assert(i >= 0);
2018                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2019                         set_compound_graph_path_node(path, i, entry->v.entity);
2020                 } else {
2021                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2022                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2023                 }
2024         }
2025         assert(i == -1);
2026
2027         return path;
2028 }
2029
2030 static void create_initializer_value(initializer_value_t *initializer,
2031                                      ir_entity *entity,
2032                                      compound_graph_path_entry_t *entry,
2033                                      int len)
2034 {
2035         ir_node             *node = expression_to_firm(initializer->value);
2036         ir_type             *type = get_entity_type(entity);
2037         compound_graph_path *path = create_compound_path(type, entry, len);
2038         add_compound_ent_value_w_path(entity, node, path);
2039 }
2040
2041 static void create_initializer_compound(initializer_list_t *initializer,
2042                                         compound_type_t *type,
2043                                         ir_entity *entity,
2044                                         compound_graph_path_entry_t *last_entry,
2045                                         int len)
2046 {
2047         declaration_t *compound_declaration = type->declaration;
2048
2049         declaration_t *compound_entry = compound_declaration->context.declarations;
2050
2051         compound_graph_path_entry_t entry;
2052         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2053         entry.prev = last_entry;
2054         ++len;
2055
2056         size_t i = 0;
2057         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2058                 if(compound_entry->symbol == NULL)
2059                         continue;
2060                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2061                         continue;
2062
2063                 if(i >= initializer->len)
2064                         break;
2065
2066                 entry.v.entity = compound_entry->v.entity;
2067
2068                 initializer_t *sub_initializer = initializer->initializers[i];
2069
2070                 assert(compound_entry != NULL);
2071                 assert(compound_entry->declaration_type
2072                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2073
2074                 if(sub_initializer->type == INITIALIZER_VALUE) {
2075                         create_initializer_value(&sub_initializer->value,
2076                                                  entity, &entry, len);
2077                 } else {
2078                         type_t *entry_type = skip_typeref(compound_entry->type);
2079                         create_initializer_object(sub_initializer, entry_type, entity,
2080                                                   &entry, len);
2081                 }
2082
2083                 ++i;
2084         }
2085 }
2086
2087 static void create_initializer_array(initializer_list_t *initializer,
2088                                      array_type_t *type, ir_entity *entity,
2089                                      compound_graph_path_entry_t *last_entry,
2090                                      int len)
2091 {
2092         type_t *element_type = type->element_type;
2093         element_type         = skip_typeref(element_type);
2094
2095         compound_graph_path_entry_t entry;
2096         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2097         entry.prev = last_entry;
2098         ++len;
2099
2100         size_t i;
2101         for(i = 0; i < initializer->len; ++i) {
2102                 entry.v.array_index = i;
2103
2104                 initializer_t *sub_initializer = initializer->initializers[i];
2105
2106                 if(sub_initializer->type == INITIALIZER_VALUE) {
2107                         create_initializer_value(&sub_initializer->value,
2108                                                  entity, &entry, len);
2109                 } else {
2110                         create_initializer_object(sub_initializer, element_type, entity,
2111                                                   &entry, len);
2112                 }
2113         }
2114
2115 #if 0
2116         /* TODO: initialize rest... */
2117         if(type->size_expression != NULL) {
2118                 size_t array_len = fold_constant(type->size_expression);
2119                 for( ; i < array_len; ++i) {
2120
2121                 }
2122         }
2123 #endif
2124 }
2125
2126 static void create_initializer_string(initializer_string_t *initializer,
2127                                       array_type_t *type, ir_entity *entity,
2128                                       compound_graph_path_entry_t *last_entry,
2129                                       int len)
2130 {
2131         type_t *element_type = type->element_type;
2132         element_type         = skip_typeref(element_type);
2133
2134         compound_graph_path_entry_t entry;
2135         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2136         entry.prev = last_entry;
2137         ++len;
2138
2139         ir_type    *irtype  = get_entity_type(entity);
2140         size_t      arr_len = get_array_type_size(type);
2141         const char *p       = initializer->string;
2142         size_t      i       = 0;
2143         for(i = 0; i < arr_len; ++i, ++p) {
2144                 entry.v.array_index = i;
2145
2146                 ir_node             *node = new_Const_long(mode_Bs, *p);
2147                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2148                 add_compound_ent_value_w_path(entity, node, path);
2149
2150                 if(*p == '\0')
2151                         break;
2152         }
2153 }
2154
2155 static void create_initializer_wide_string(
2156         const initializer_wide_string_t *const initializer, array_type_t *const type,
2157         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2158         int len)
2159 {
2160         type_t *element_type = type->element_type;
2161         element_type         = skip_typeref(element_type);
2162
2163         compound_graph_path_entry_t entry;
2164         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2165         entry.prev = last_entry;
2166         ++len;
2167
2168         ir_type           *const irtype  = get_entity_type(entity);
2169         const size_t             arr_len = get_array_type_size(type);
2170         const wchar_rep_t *      p       = initializer->string.begin;
2171         const wchar_rep_t *const end     = p + initializer->string.size;
2172         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2173                 entry.v.array_index = i;
2174
2175                 ir_node             *node = new_Const_long(mode_Is, *p);
2176                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2177                 add_compound_ent_value_w_path(entity, node, path);
2178         }
2179 }
2180
2181 static void create_initializer_object(initializer_t *initializer, type_t *type,
2182                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2183 {
2184         if(is_type_array(type)) {
2185                 array_type_t *array_type = &type->array;
2186
2187                 switch (initializer->type) {
2188                         case INITIALIZER_STRING: {
2189                                 initializer_string_t *const string = &initializer->string;
2190                                 create_initializer_string(string, array_type, entity, entry, len);
2191                                 return;
2192                         }
2193
2194                         case INITIALIZER_WIDE_STRING: {
2195                                 initializer_wide_string_t *const string = &initializer->wide_string;
2196                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2197                                 return;
2198                         }
2199
2200                         case INITIALIZER_LIST: {
2201                                 initializer_list_t *const list = &initializer->list;
2202                                 create_initializer_array(list, array_type, entity, entry, len);
2203                                 return;
2204                         }
2205
2206                         case INITIALIZER_VALUE:
2207                                 break;
2208                 }
2209                 panic("Unhandled initializer");
2210         } else {
2211                 assert(initializer->type == INITIALIZER_LIST);
2212                 initializer_list_t *list = &initializer->list;
2213
2214                 assert(is_type_compound(type));
2215                 compound_type_t *compound_type = &type->compound;
2216                 create_initializer_compound(list, compound_type, entity, entry, len);
2217         }
2218 }
2219
2220 static void create_initializer_local_variable_entity(declaration_t *declaration)
2221 {
2222         initializer_t *initializer = declaration->init.initializer;
2223         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2224         ir_entity     *entity      = declaration->v.entity;
2225         ir_node       *memory      = get_store();
2226         ir_node       *nomem       = new_NoMem();
2227         ir_node       *frame       = get_irg_frame(current_ir_graph);
2228         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2229
2230         if(initializer->type == INITIALIZER_VALUE) {
2231                 initializer_value_t *initializer_value = &initializer->value;
2232
2233                 ir_node *value = expression_to_firm(initializer_value->value);
2234                 type_t  *type  = skip_typeref(declaration->type);
2235                 assign_value(dbgi, addr, type, value);
2236                 return;
2237         }
2238
2239         /* create a "template" entity which is copied to the entity on the stack */
2240         ident     *id          = unique_ident("initializer");
2241         ir_type   *irtype      = get_ir_type(declaration->type);
2242         ir_type   *global_type = get_glob_type();
2243         ir_entity *init_entity = new_entity(global_type, id, irtype);
2244         set_entity_ld_ident(init_entity, id);
2245
2246         set_entity_variability(init_entity, variability_initialized);
2247         set_entity_visibility(init_entity, visibility_local);
2248         set_entity_allocation(init_entity, allocation_static);
2249
2250         ir_graph *old_current_ir_graph = current_ir_graph;
2251         current_ir_graph = get_const_code_irg();
2252
2253         type_t *type = skip_typeref(declaration->type);
2254         create_initializer_object(initializer, type, init_entity, NULL, 0);
2255
2256         assert(current_ir_graph == get_const_code_irg());
2257         current_ir_graph = old_current_ir_graph;
2258
2259         ir_node *src_addr  = create_symconst(dbgi, init_entity);
2260         ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2261
2262         ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2263         set_store(copyb_mem);
2264 }
2265
2266 static void create_initializer(declaration_t *declaration)
2267 {
2268         initializer_t *initializer = declaration->init.initializer;
2269         if(initializer == NULL)
2270                 return;
2271
2272         declaration_type_t declaration_type
2273                 = (declaration_type_t) declaration->declaration_type;
2274         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2275                 create_initializer_local_variable_entity(declaration);
2276                 return;
2277         }
2278
2279         if(initializer->type == INITIALIZER_VALUE) {
2280                 initializer_value_t *initializer_value = &initializer->value;
2281
2282                 ir_node *value = expression_to_firm(initializer_value->value);
2283
2284                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2285                         set_value(declaration->v.value_number, value);
2286                 } else {
2287                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2288
2289                         ir_entity *entity = declaration->v.entity;
2290
2291                         set_entity_variability(entity, variability_initialized);
2292                         set_atomic_ent_value(entity, value);
2293                 }
2294         } else {
2295                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2296                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2297
2298                 ir_entity *entity = declaration->v.entity;
2299                 set_entity_variability(entity, variability_initialized);
2300
2301                 type_t *type = skip_typeref(declaration->type);
2302                 create_initializer_object(initializer, type, entity, NULL, 0);
2303         }
2304 }
2305
2306 static void create_local_variable(declaration_t *declaration)
2307 {
2308         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2309
2310         bool needs_entity = declaration->address_taken;
2311         type_t *type = skip_typeref(declaration->type);
2312
2313         if(is_type_array(type) || is_type_compound(type)) {
2314                 needs_entity = true;
2315         }
2316
2317         if(needs_entity) {
2318                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2319                 create_declaration_entity(declaration,
2320                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2321                                           frame_type);
2322         } else {
2323                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2324                 declaration->v.value_number   = next_value_number_function;
2325                 ++next_value_number_function;
2326         }
2327
2328         create_initializer(declaration);
2329 }
2330
2331 static void create_local_static_variable(declaration_t *declaration)
2332 {
2333         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2334
2335         type_t    *type        = skip_typeref(declaration->type);
2336         ir_type   *global_type = get_glob_type();
2337         ident     *id          = unique_ident(declaration->symbol->string);
2338         ir_type   *irtype      = get_ir_type(type);
2339         ir_entity *entity      = new_entity(global_type, id, irtype);
2340         set_entity_ld_ident(entity, id);
2341
2342         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2343         declaration->v.entity         = entity;
2344         set_entity_variability(entity, variability_uninitialized);
2345         set_entity_visibility(entity, visibility_local);
2346         set_entity_allocation(entity, allocation_static);
2347
2348         ir_graph *old_current_ir_graph = current_ir_graph;
2349         current_ir_graph = get_const_code_irg();
2350
2351         create_initializer(declaration);
2352
2353         assert(current_ir_graph == get_const_code_irg());
2354         current_ir_graph = old_current_ir_graph;
2355 }
2356
2357
2358
2359 static void return_statement_to_firm(return_statement_t *statement)
2360 {
2361         if(get_cur_block() == NULL)
2362                 return;
2363
2364         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2365
2366         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2367
2368         ir_node *in[1];
2369         int      in_len;
2370         if(get_method_n_ress(func_irtype) > 0) {
2371                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2372
2373                 if(statement->return_value != NULL) {
2374                         ir_node *node = expression_to_firm(statement->return_value);
2375                         node  = do_strict_conv(dbgi, node);
2376                         in[0] = node;
2377                 } else {
2378                         ir_mode *mode;
2379                         if(is_compound_type(res_type)) {
2380                                 mode = mode_P_data;
2381                         } else {
2382                                 mode = get_type_mode(res_type);
2383                         }
2384                         in[0] = new_Unknown(mode);
2385                 }
2386                 in_len = 1;
2387         } else {
2388                 /* build return_value for its side effects */
2389                 if(statement->return_value != NULL) {
2390                         expression_to_firm(statement->return_value);
2391                 }
2392                 in_len = 0;
2393         }
2394
2395         ir_node  *store = get_store();
2396         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2397
2398         ir_node *end_block = get_irg_end_block(current_ir_graph);
2399         add_immBlock_pred(end_block, ret);
2400
2401         set_cur_block(NULL);
2402 }
2403
2404 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2405 {
2406         if(get_cur_block() == NULL)
2407                 return NULL;
2408
2409         return expression_to_firm(statement->expression);
2410 }
2411
2412 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2413 {
2414         ir_node     *result    = NULL;
2415         statement_t *statement = compound->statements;
2416         for( ; statement != NULL; statement = statement->base.next) {
2417                 //context2firm(&statement->context);
2418
2419                 if(statement->base.next == NULL
2420                                 && statement->type == STATEMENT_EXPRESSION) {
2421                         result = expression_statement_to_firm(
2422                                         (expression_statement_t*) statement);
2423                         break;
2424                 }
2425                 statement_to_firm(statement);
2426         }
2427
2428         return result;
2429 }
2430
2431 static void create_local_declaration(declaration_t *declaration)
2432 {
2433         type_t *type = skip_typeref(declaration->type);
2434
2435         switch ((storage_class_tag_t) declaration->storage_class) {
2436         case STORAGE_CLASS_STATIC:
2437                 create_local_static_variable(declaration);
2438                 return;
2439         case STORAGE_CLASS_ENUM_ENTRY:
2440                 panic("enum entry declaration in local block found");
2441         case STORAGE_CLASS_EXTERN:
2442                 panic("extern declaration in local block found");
2443         case STORAGE_CLASS_NONE:
2444         case STORAGE_CLASS_AUTO:
2445         case STORAGE_CLASS_REGISTER:
2446                 if(is_type_function(type)) {
2447                         panic("nested functions not supported yet");
2448                 } else {
2449                         create_local_variable(declaration);
2450                 }
2451                 return;
2452         case STORAGE_CLASS_TYPEDEF:
2453         case STORAGE_CLASS_THREAD:
2454         case STORAGE_CLASS_THREAD_EXTERN:
2455         case STORAGE_CLASS_THREAD_STATIC:
2456                 return;
2457         }
2458         panic("invalid storage class found");
2459 }
2460
2461 static void declaration_statement_to_firm(declaration_statement_t *statement)
2462 {
2463         declaration_t *declaration = statement->declarations_begin;
2464         declaration_t *end         = statement->declarations_end->next;
2465         for( ; declaration != end; declaration = declaration->next) {
2466                 create_local_variable(declaration);
2467         }
2468 }
2469
2470 static void if_statement_to_firm(if_statement_t *statement)
2471 {
2472         ir_node *cur_block = get_cur_block();
2473
2474         ir_node *fallthrough_block = new_immBlock();
2475
2476         /* the true (blocks) */
2477         ir_node *true_block;
2478         if (statement->true_statement != NULL) {
2479                 true_block = new_immBlock();
2480                 statement_to_firm(statement->true_statement);
2481                 if(get_cur_block() != NULL) {
2482                         ir_node *jmp = new_Jmp();
2483                         add_immBlock_pred(fallthrough_block, jmp);
2484                 }
2485         } else {
2486                 true_block = fallthrough_block;
2487         }
2488
2489         /* the false (blocks) */
2490         ir_node *false_block;
2491         if(statement->false_statement != NULL) {
2492                 false_block = new_immBlock();
2493
2494                 statement_to_firm(statement->false_statement);
2495                 if(get_cur_block() != NULL) {
2496                         ir_node *jmp = new_Jmp();
2497                         add_immBlock_pred(fallthrough_block, jmp);
2498                 }
2499         } else {
2500                 false_block = fallthrough_block;
2501         }
2502
2503         /* create the condition */
2504         if(cur_block != NULL) {
2505                 set_cur_block(cur_block);
2506                 create_condition_evaluation(statement->condition, true_block,
2507                                             false_block);
2508         }
2509
2510         mature_immBlock(true_block);
2511         if(false_block != fallthrough_block) {
2512                 mature_immBlock(false_block);
2513         }
2514         mature_immBlock(fallthrough_block);
2515
2516         set_cur_block(fallthrough_block);
2517 }
2518
2519 static void while_statement_to_firm(while_statement_t *statement)
2520 {
2521         ir_node *jmp = NULL;
2522         if(get_cur_block() != NULL) {
2523                 jmp = new_Jmp();
2524         }
2525
2526         /* create the header block */
2527         ir_node *header_block = new_immBlock();
2528         if(jmp != NULL) {
2529                 add_immBlock_pred(header_block, jmp);
2530         }
2531
2532         /* the false block */
2533         ir_node *false_block = new_immBlock();
2534
2535         /* the loop body */
2536         ir_node *body_block;
2537         if (statement->body != NULL) {
2538                 ir_node *old_continue_label = continue_label;
2539                 ir_node *old_break_label    = break_label;
2540                 continue_label              = header_block;
2541                 break_label                 = false_block;
2542
2543                 body_block = new_immBlock();
2544                 statement_to_firm(statement->body);
2545
2546                 assert(continue_label == header_block);
2547                 assert(break_label    == false_block);
2548                 continue_label = old_continue_label;
2549                 break_label    = old_break_label;
2550
2551                 if(get_cur_block() != NULL) {
2552                         jmp = new_Jmp();
2553                         add_immBlock_pred(header_block, jmp);
2554                 }
2555         } else {
2556                 body_block = header_block;
2557         }
2558
2559         /* create the condition */
2560         set_cur_block(header_block);
2561
2562         create_condition_evaluation(statement->condition, body_block, false_block);
2563         mature_immBlock(body_block);
2564         mature_immBlock(false_block);
2565         mature_immBlock(header_block);
2566
2567         set_cur_block(false_block);
2568 }
2569
2570 static void do_while_statement_to_firm(do_while_statement_t *statement)
2571 {
2572         ir_node *jmp = NULL;
2573         if(get_cur_block() != NULL) {
2574                 jmp = new_Jmp();
2575         }
2576
2577         /* create the header block */
2578         ir_node *header_block = new_immBlock();
2579
2580         /* the false block */
2581         ir_node *false_block = new_immBlock();
2582
2583         /* the loop body */
2584         ir_node *body_block = new_immBlock();
2585         if(jmp != NULL) {
2586                 add_immBlock_pred(body_block, jmp);
2587         }
2588
2589         if (statement->body != NULL) {
2590                 ir_node *old_continue_label = continue_label;
2591                 ir_node *old_break_label    = break_label;
2592                 continue_label              = header_block;
2593                 break_label                 = false_block;
2594
2595                 statement_to_firm(statement->body);
2596
2597                 assert(continue_label == header_block);
2598                 assert(break_label    == false_block);
2599                 continue_label = old_continue_label;
2600                 break_label    = old_break_label;
2601
2602                 if (get_cur_block() == NULL) {
2603                         mature_immBlock(header_block);
2604                         mature_immBlock(body_block);
2605                         mature_immBlock(false_block);
2606                         return;
2607                 }
2608         }
2609
2610         ir_node *body_jmp = new_Jmp();
2611         add_immBlock_pred(header_block, body_jmp);
2612         mature_immBlock(header_block);
2613
2614         /* create the condition */
2615         set_cur_block(header_block);
2616
2617         create_condition_evaluation(statement->condition, body_block, false_block);
2618         mature_immBlock(body_block);
2619         mature_immBlock(false_block);
2620         mature_immBlock(header_block);
2621
2622         set_cur_block(false_block);
2623 }
2624
2625 static void for_statement_to_firm(for_statement_t *statement)
2626 {
2627         ir_node *jmp = NULL;
2628         if (get_cur_block() != NULL) {
2629                 if(statement->initialisation != NULL) {
2630                         expression_to_firm(statement->initialisation);
2631                 }
2632
2633                 /* create declarations */
2634                 declaration_t *declaration = statement->context.declarations;
2635                 for( ; declaration != NULL; declaration = declaration->next) {
2636                         create_local_declaration(declaration);
2637                 }
2638
2639                 jmp = new_Jmp();
2640         }
2641
2642
2643         /* create the step block */
2644         ir_node *const step_block = new_immBlock();
2645         if (statement->step != NULL) {
2646                 expression_to_firm(statement->step);
2647         }
2648         ir_node *const step_jmp = new_Jmp();
2649
2650         /* create the header block */
2651         ir_node *const header_block = new_immBlock();
2652         if (jmp != NULL) {
2653                 add_immBlock_pred(header_block, jmp);
2654         }
2655         add_immBlock_pred(header_block, step_jmp);
2656
2657         /* the false block */
2658         ir_node *const false_block = new_immBlock();
2659
2660         /* the loop body */
2661         ir_node * body_block;
2662         if (statement->body != NULL) {
2663                 ir_node *const old_continue_label = continue_label;
2664                 ir_node *const old_break_label    = break_label;
2665                 continue_label = step_block;
2666                 break_label    = false_block;
2667
2668                 body_block = new_immBlock();
2669                 statement_to_firm(statement->body);
2670
2671                 assert(continue_label == step_block);
2672                 assert(break_label    == false_block);
2673                 continue_label = old_continue_label;
2674                 break_label    = old_break_label;
2675
2676                 if (get_cur_block() != NULL) {
2677                         jmp = new_Jmp();
2678                         add_immBlock_pred(step_block, jmp);
2679                 }
2680         } else {
2681                 body_block = step_block;
2682         }
2683
2684         /* create the condition */
2685         set_cur_block(header_block);
2686         if (statement->condition != NULL) {
2687                 create_condition_evaluation(statement->condition, body_block,
2688                                             false_block);
2689         } else {
2690                 keep_alive(header_block);
2691                 jmp = new_Jmp();
2692                 add_immBlock_pred(body_block, jmp);
2693         }
2694
2695         mature_immBlock(body_block);
2696         mature_immBlock(false_block);
2697         mature_immBlock(step_block);
2698         mature_immBlock(header_block);
2699         mature_immBlock(false_block);
2700
2701         set_cur_block(false_block);
2702 }
2703
2704 static void create_jump_statement(const statement_t *statement,
2705                                   ir_node *target_block)
2706 {
2707         if(get_cur_block() == NULL)
2708                 return;
2709
2710         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2711         ir_node  *jump = new_d_Jmp(dbgi);
2712         add_immBlock_pred(target_block, jump);
2713
2714         set_cur_block(NULL);
2715 }
2716
2717 static void switch_statement_to_firm(const switch_statement_t *statement)
2718 {
2719         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2720
2721         ir_node *expression  = expression_to_firm(statement->expression);
2722         ir_node *cond        = new_d_Cond(dbgi, expression);
2723         ir_node *break_block = new_immBlock();
2724
2725         set_cur_block(NULL);
2726
2727         ir_node *const old_switch_cond       = current_switch_cond;
2728         ir_node *const old_break_label       = break_label;
2729         const bool     old_saw_default_label = saw_default_label;
2730         current_switch_cond                  = cond;
2731         break_label                          = break_block;
2732
2733         statement_to_firm(statement->body);
2734
2735         if(get_cur_block() != NULL) {
2736                 ir_node *jmp = new_Jmp();
2737                 add_immBlock_pred(break_block, jmp);
2738         }
2739
2740         if (!saw_default_label) {
2741                 set_cur_block(get_nodes_block(cond));
2742                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2743                                                         MAGIC_DEFAULT_PN_NUMBER);
2744                 add_immBlock_pred(break_block, proj);
2745         }
2746
2747         assert(current_switch_cond == cond);
2748         assert(break_label         == break_block);
2749         current_switch_cond = old_switch_cond;
2750         break_label         = old_break_label;
2751         saw_default_label   = old_saw_default_label;
2752
2753         mature_immBlock(break_block);
2754         set_cur_block(break_block);
2755 }
2756
2757 static void case_label_to_firm(const case_label_statement_t *statement)
2758 {
2759         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2760
2761         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2762
2763         /* let's create a node and hope firm constant folding creates a Const
2764          * node... */
2765         ir_node *proj;
2766         set_cur_block(get_nodes_block(current_switch_cond));
2767         if(statement->expression) {
2768                 long pn = fold_constant(statement->expression);
2769                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2770                         /* oops someone detected our cheating... */
2771                         panic("magic default pn used");
2772                 }
2773                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2774         } else {
2775                 saw_default_label = true;
2776                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2777                                          MAGIC_DEFAULT_PN_NUMBER);
2778         }
2779
2780         ir_node *block = new_immBlock();
2781         if (fallthrough != NULL) {
2782                 add_immBlock_pred(block, fallthrough);
2783         }
2784         add_immBlock_pred(block, proj);
2785         mature_immBlock(block);
2786
2787         statement_to_firm(statement->label_statement);
2788 }
2789
2790 static ir_node *get_label_block(declaration_t *label)
2791 {
2792         assert(label->namespc == NAMESPACE_LABEL);
2793
2794         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2795                 return label->v.block;
2796         }
2797         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2798
2799         ir_node *old_cur_block = get_cur_block();
2800         ir_node *block         = new_immBlock();
2801         set_cur_block(old_cur_block);
2802
2803         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2804         label->v.block          = block;
2805
2806         ARR_APP1(ir_node *, imature_blocks, block);
2807
2808         return block;
2809 }
2810
2811 static void label_to_firm(const label_statement_t *statement)
2812 {
2813         ir_node *block = get_label_block(statement->label);
2814
2815         if(get_cur_block() != NULL) {
2816                 ir_node *jmp = new_Jmp();
2817                 add_immBlock_pred(block, jmp);
2818         }
2819
2820         set_cur_block(block);
2821         keep_alive(block);
2822
2823         statement_to_firm(statement->label_statement);
2824 }
2825
2826 static void goto_to_firm(const goto_statement_t *statement)
2827 {
2828         if(get_cur_block() == NULL)
2829                 return;
2830
2831         ir_node *block = get_label_block(statement->label);
2832         ir_node *jmp   = new_Jmp();
2833         add_immBlock_pred(block, jmp);
2834
2835         set_cur_block(NULL);
2836 }
2837
2838 typedef enum modifier_t {
2839         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
2840         ASM_MODIFIER_READ_WRITE   = 1 << 1,
2841         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
2842         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
2843 } modifier_t;
2844
2845 #if 0
2846 static void asm_statement_to_firm(const asm_statement_t *statement)
2847 {
2848         bool needs_memory = false;
2849
2850         size_t         n_clobbers = 0;
2851         asm_clobber_t *clobber    = statement->clobbers;
2852         for( ; clobber != NULL; clobber = clobber->next) {
2853                 if(strcmp(clobber->clobber, "memory") == 0) {
2854                         needs_memory = true;
2855                         continue;
2856                 }
2857
2858                 ident *id = new_id_from_str(clobber->clobber);
2859                 obstack_ptr_grow(&asm_obst, id);
2860                 ++n_clobbers;
2861         }
2862         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
2863         ident **clobbers = NULL;
2864         if(n_clobbers > 0) {
2865                 clobbers = obstack_finish(&asm_obst);
2866         }
2867
2868         /* find and count input and output constraints */
2869         asm_constraint_t *constraint = statement->inputs;
2870         for( ; constraint != NULL; constraint = constraint->next) {
2871                 int  modifiers      = 0;
2872                 bool supports_memop = false;
2873                 for(const char *c = constraint->constraints; *c != 0; ++c) {
2874                         /* TODO: improve error messages */
2875                         switch(*c) {
2876                         case '?':
2877                         case '!':
2878                                 panic("multiple alternative assembler constraints not "
2879                                       "supported");
2880                         case 'm':
2881                         case 'o':
2882                         case 'V':
2883                         case '<':
2884                         case '>':
2885                         case 'X':
2886                                 supports_memop = true;
2887                                 obstack_1grow(&asm_obst, *c);
2888                                 break;
2889                         case '=':
2890                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
2891                                         panic("inconsistent register constraints");
2892                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
2893                                 break;
2894                         case '+':
2895                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
2896                                         panic("inconsistent register constraints");
2897                                 modifiers |= ASM_MODIFIER_READ_WRITE;
2898                                 break;
2899                         case '&':
2900                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
2901                                 panic("early clobber assembler constraint not supported yet");
2902                                 break;
2903                         case '%':
2904                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
2905                                 panic("commutative assembler constraint not supported yet");
2906                                 break;
2907                         case '#':
2908                                 /* skip register preferences stuff... */
2909                                 while(*c != 0 && *c != ',')
2910                                         ++c;
2911                                 break;
2912                         case '*':
2913                                 /* skip register preferences stuff... */
2914                                 ++c;
2915                                 break;
2916                         default:
2917                                 obstack_1grow(&asm_obst, *c);
2918                                 break;
2919                         }
2920                 }
2921                 obstack_1grow(&asm_obst, '\0');
2922                 const char *constraint_string = obstack_finish(&asm_obst);
2923
2924                 needs_memory |= supports_memop;
2925                 if(supports_memop) {
2926
2927                 }
2928         }
2929
2930 }
2931 #endif
2932
2933 static void statement_to_firm(statement_t *statement)
2934 {
2935         switch(statement->type) {
2936         case STATEMENT_INVALID:
2937                 panic("invalid statement found");
2938         case STATEMENT_COMPOUND:
2939                 compound_statement_to_firm(&statement->compound);
2940                 return;
2941         case STATEMENT_RETURN:
2942                 return_statement_to_firm(&statement->returns);
2943                 return;
2944         case STATEMENT_EXPRESSION:
2945                 expression_statement_to_firm(&statement->expression);
2946                 return;
2947         case STATEMENT_IF:
2948                 if_statement_to_firm(&statement->ifs);
2949                 return;
2950         case STATEMENT_WHILE:
2951                 while_statement_to_firm(&statement->whiles);
2952                 return;
2953         case STATEMENT_DO_WHILE:
2954                 do_while_statement_to_firm(&statement->do_while);
2955                 return;
2956         case STATEMENT_DECLARATION:
2957                 declaration_statement_to_firm(&statement->declaration);
2958                 return;
2959         case STATEMENT_BREAK:
2960                 create_jump_statement(statement, break_label);
2961                 return;
2962         case STATEMENT_CONTINUE:
2963                 create_jump_statement(statement, continue_label);
2964                 return;
2965         case STATEMENT_SWITCH:
2966                 switch_statement_to_firm(&statement->switchs);
2967                 return;
2968         case STATEMENT_CASE_LABEL:
2969                 case_label_to_firm(&statement->case_label);
2970                 return;
2971         case STATEMENT_FOR:
2972                 for_statement_to_firm(&statement->fors);
2973                 return;
2974         case STATEMENT_LABEL:
2975                 label_to_firm(&statement->label);
2976                 return;
2977         case STATEMENT_GOTO:
2978                 goto_to_firm(&statement->gotos);
2979                 return;
2980         case STATEMENT_ASM:
2981                 //asm_statement_to_firm(&statement->asms);
2982                 //return;
2983                 break;
2984         }
2985         panic("Statement not implemented\n");
2986 }
2987
2988 static int count_local_declarations(const declaration_t *      decl,
2989                                     const declaration_t *const end)
2990 {
2991         int count = 0;
2992         for (; decl != end; decl = decl->next) {
2993                 const type_t *type = skip_typeref(decl->type);
2994                 switch (type->type) {
2995                         case TYPE_ATOMIC:
2996                         case TYPE_ENUM:
2997                         case TYPE_POINTER:
2998                                 if (!decl->address_taken)
2999                                         ++count;
3000                                 break;
3001
3002                         default: break;
3003                 }
3004         }
3005         return count;
3006 }
3007
3008 static int count_decls_in_stmts(const statement_t *stmt)
3009 {
3010         int count = 0;
3011         for (; stmt != NULL; stmt = stmt->base.next) {
3012                 switch (stmt->type) {
3013                         case STATEMENT_DECLARATION: {
3014                                 const declaration_statement_t *const decl_stmt =
3015                                         (const declaration_statement_t*)stmt;
3016                                 count += count_local_declarations(decl_stmt->declarations_begin,
3017                                                                   decl_stmt->declarations_end->next);
3018                                 break;
3019                         }
3020
3021                         case STATEMENT_COMPOUND: {
3022                                 const compound_statement_t *const comp =
3023                                         (const compound_statement_t*)stmt;
3024                                 count += count_decls_in_stmts(comp->statements);
3025                                 break;
3026                         }
3027
3028                         case STATEMENT_IF: {
3029                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
3030                                 count += count_decls_in_stmts(if_stmt->true_statement);
3031                                 count += count_decls_in_stmts(if_stmt->false_statement);
3032                                 break;
3033                         }
3034
3035                         case STATEMENT_SWITCH: {
3036                                 const switch_statement_t *const switch_stmt =
3037                                         (const switch_statement_t*)stmt;
3038                                 count += count_decls_in_stmts(switch_stmt->body);
3039                                 break;
3040                         }
3041
3042                         case STATEMENT_LABEL: {
3043                                 const label_statement_t *const label_stmt =
3044                                         (const label_statement_t*)stmt;
3045                                 count += count_decls_in_stmts(label_stmt->label_statement);
3046                                 break;
3047                         }
3048
3049                         case STATEMENT_WHILE: {
3050                                 const while_statement_t *const while_stmt =
3051                                         (const while_statement_t*)stmt;
3052                                 count += count_decls_in_stmts(while_stmt->body);
3053                                 break;
3054                         }
3055
3056                         case STATEMENT_DO_WHILE: {
3057                                 const do_while_statement_t *const do_while_stmt =
3058                                         (const do_while_statement_t*)stmt;
3059                                 count += count_decls_in_stmts(do_while_stmt->body);
3060                                 break;
3061                         }
3062
3063                         case STATEMENT_FOR: {
3064                                 const for_statement_t *const for_stmt =
3065                                         (const for_statement_t*)stmt;
3066                                 /* TODO initialisation */
3067                                 count += count_decls_in_stmts(for_stmt->body);
3068                                 break;
3069                         }
3070
3071                         case STATEMENT_ASM:
3072                         case STATEMENT_BREAK:
3073                         case STATEMENT_CASE_LABEL:
3074                         case STATEMENT_CONTINUE:
3075                         case STATEMENT_EXPRESSION:
3076                         case STATEMENT_GOTO:
3077                         case STATEMENT_INVALID:
3078                         case STATEMENT_RETURN:
3079                                 break;
3080                 }
3081         }
3082         return count;
3083 }
3084
3085 static int get_function_n_local_vars(declaration_t *declaration)
3086 {
3087         int count = 0;
3088
3089         /* count parameters */
3090         count += count_local_declarations(declaration->context.declarations, NULL);
3091
3092         /* count local variables declared in body */
3093         count += count_decls_in_stmts(declaration->init.statement);
3094
3095         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
3096          * for expression statements... */
3097         count += 10;
3098
3099         return count;
3100 }
3101
3102 static void initialize_function_parameters(declaration_t *declaration)
3103 {
3104         ir_graph        *irg             = current_ir_graph;
3105         ir_node         *args            = get_irg_args(irg);
3106         ir_node         *start_block     = get_irg_start_block(irg);
3107         ir_type         *function_irtype = get_ir_type(declaration->type);
3108
3109         int            n         = 0;
3110         declaration_t *parameter = declaration->context.declarations;
3111         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3112                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
3113                 type_t *type = skip_typeref(parameter->type);
3114
3115                 bool needs_entity = parameter->address_taken;
3116                 assert(!is_type_array(type));
3117                 if(is_type_compound(type)) {
3118                         needs_entity = true;
3119                 }
3120
3121                 if(needs_entity) {
3122                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3123                         ident     *id     = new_id_from_str(parameter->symbol->string);
3124                         set_entity_ident(entity, id);
3125
3126                         parameter->declaration_type
3127                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
3128                         parameter->v.entity = entity;
3129                         continue;
3130                 }
3131
3132                 ir_mode *mode = get_ir_mode(parameter->type);
3133                 long     pn   = n;
3134                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3135
3136                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
3137                 parameter->v.value_number   = next_value_number_function;
3138                 ++next_value_number_function;
3139
3140                 set_value(parameter->v.value_number, proj);
3141         }
3142 }
3143
3144 static void create_function(declaration_t *declaration)
3145 {
3146         ir_entity *function_entity = get_function_entity(declaration);
3147
3148         if(declaration->init.statement == NULL)
3149                 return;
3150
3151         current_function_decl = declaration;
3152         current_function_name = NULL;
3153
3154         assert(imature_blocks == NULL);
3155         imature_blocks = NEW_ARR_F(ir_node*, 0);
3156
3157         int       n_local_vars = get_function_n_local_vars(declaration);
3158         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3159         ir_node  *first_block  = get_cur_block();
3160
3161         next_value_number_function = 0;
3162         initialize_function_parameters(declaration);
3163
3164         statement_to_firm(declaration->init.statement);
3165
3166         ir_node *end_block = get_irg_end_block(irg);
3167
3168         /* do we have a return statement yet? */
3169         if(get_cur_block() != NULL) {
3170                 type_t *type = skip_typeref(declaration->type);
3171                 assert(is_type_function(type));
3172                 const function_type_t *func_type   = &type->function;
3173                 const type_t          *return_type
3174                         = skip_typeref(func_type->return_type);
3175
3176                 ir_node *ret;
3177                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3178                         ret = new_Return(get_store(), 0, NULL);
3179                 } else {
3180                         ir_mode *mode;
3181                         if(is_type_scalar(return_type)) {
3182                                 mode = get_ir_mode(func_type->return_type);
3183                         } else {
3184                                 mode = mode_P_data;
3185                         }
3186
3187                         ir_node *in[1];
3188                         // §5.1.2.2.3 main implicitly returns 0
3189                         if (strcmp(declaration->symbol->string, "main") == 0) {
3190                                 in[0] = new_Const(mode, get_mode_null(mode));
3191                         } else {
3192                                 in[0] = new_Unknown(mode);
3193                         }
3194                         ret = new_Return(get_store(), 1, in);
3195                 }
3196                 add_immBlock_pred(end_block, ret);
3197         }
3198
3199         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3200                 mature_immBlock(imature_blocks[i]);
3201         }
3202         DEL_ARR_F(imature_blocks);
3203         imature_blocks = NULL;
3204
3205         mature_immBlock(first_block);
3206         mature_immBlock(end_block);
3207
3208         irg_finalize_cons(irg);
3209
3210         /* finalize the frame type */
3211         ir_type *frame_type = get_irg_frame_type(irg);
3212         int      n          = get_compound_n_members(frame_type);
3213         int      align_all  = 4;
3214         int      offset     = 0;
3215         for(int i = 0; i < n; ++i) {
3216                 ir_entity *entity      = get_compound_member(frame_type, i);
3217                 ir_type   *entity_type = get_entity_type(entity);
3218
3219                 int align = get_type_alignment_bytes(entity_type);
3220                 if(align > align_all)
3221                         align_all = align;
3222                 int misalign = 0;
3223                 if(align > 0) {
3224                         misalign  = offset % align;
3225                         if(misalign > 0) {
3226                                 offset += align - misalign;
3227                         }
3228                 }
3229
3230                 set_entity_offset(entity, offset);
3231                 offset += get_type_size_bytes(entity_type);
3232         }
3233         set_type_size_bytes(frame_type, offset);
3234         set_type_alignment_bytes(frame_type, align_all);
3235         set_type_state(frame_type, layout_fixed);
3236
3237         irg_vrfy(irg);
3238 }
3239
3240 static void create_global_variable(declaration_t *declaration)
3241 {
3242         ir_visibility  vis;
3243         ir_type       *var_type;
3244         switch ((storage_class_tag_t)declaration->storage_class) {
3245                 case STORAGE_CLASS_STATIC:
3246                         vis = visibility_local;
3247                         goto global_var;
3248
3249                 case STORAGE_CLASS_EXTERN:
3250                         vis = visibility_external_allocated;
3251                         goto global_var;
3252
3253                 case STORAGE_CLASS_NONE:
3254                         vis = visibility_external_visible;
3255                         goto global_var;
3256
3257                 case STORAGE_CLASS_THREAD:
3258                         vis = visibility_external_visible;
3259                         goto tls_var;
3260
3261                 case STORAGE_CLASS_THREAD_EXTERN:
3262                         vis = visibility_external_allocated;
3263                         goto tls_var;
3264
3265                 case STORAGE_CLASS_THREAD_STATIC:
3266                         vis = visibility_local;
3267                         goto tls_var;
3268
3269 tls_var:
3270                         var_type = get_tls_type();
3271                         goto create_var;
3272
3273 global_var:
3274                         var_type = get_glob_type();
3275                         goto create_var;
3276
3277 create_var:
3278                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3279                                                   var_type);
3280                         set_entity_visibility(declaration->v.entity, vis);
3281
3282                         current_ir_graph = get_const_code_irg();
3283                         create_initializer(declaration);
3284                         return;
3285
3286                 case STORAGE_CLASS_TYPEDEF:
3287                 case STORAGE_CLASS_AUTO:
3288                 case STORAGE_CLASS_REGISTER:
3289                 case STORAGE_CLASS_ENUM_ENTRY:
3290                         break;
3291         }
3292         panic("Invalid storage class for global variable");
3293 }
3294
3295 static void context_to_firm(context_t *context)
3296 {
3297         /* first pass: create declarations */
3298         declaration_t *declaration = context->declarations;
3299         for( ; declaration != NULL; declaration = declaration->next) {
3300                 if(declaration->namespc != NAMESPACE_NORMAL)
3301                         continue;
3302                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3303                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3304                         continue;
3305                 if(declaration->symbol == NULL)
3306                         continue;
3307
3308                 type_t *type = skip_typeref(declaration->type);
3309                 if(is_type_function(type)) {
3310                         get_function_entity(declaration);
3311                 } else {
3312                         create_global_variable(declaration);
3313                 }
3314         }
3315
3316         /* second pass: create code */
3317         declaration = context->declarations;
3318         for( ; declaration != NULL; declaration = declaration->next) {
3319                 if(declaration->namespc != NAMESPACE_NORMAL)
3320                         continue;
3321                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3322                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3323                         continue;
3324                 if(declaration->symbol == NULL)
3325                         continue;
3326
3327                 type_t *type = declaration->type;
3328                 if(type->type != TYPE_FUNCTION)
3329                         continue;
3330
3331                 create_function(declaration);
3332         }
3333 }
3334
3335 void translation_unit_to_firm(translation_unit_t *unit)
3336 {
3337         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3338         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3339         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3340
3341         ir_type_int        = get_ir_type(type_int);
3342         ir_type_const_char = get_ir_type(type_const_char);
3343         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3344         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3345                                                        type in firm */
3346
3347         type_void->base.firm_type = ir_type_void;
3348
3349         /* just to be sure */
3350         continue_label      = NULL;
3351         break_label         = NULL;
3352         current_switch_cond = NULL;
3353
3354         context_to_firm(& unit->context);
3355 }